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A rack-mount KVM switch is not one product category, and a roundup that ranks a rack of mini PCs against a colocation-grade appliance on the same list is answering a question nobody asked. The cheap 16-port HDMI switch, the Cat5 KVM-over-IP chassis and the 1U LCD drawer solve three different problems, and the gap between them is structural, not a matter of feature count.
For the two-computer desk setups that most buying guides actually cover, see Best KVM Switches (2026). This guide is about what goes into the rack: 8, 16 and 32 targets, BIOS-level access from another building, four administrators hitting the same console, and a physical crash cart that shares one screen, keyboard and mouse across an entire cabinet.
The 2026 market also demands lifecycle awareness. Raritan moved the original Dominion KX III to end-of-life on June 5, 2026 and replaced it with the KX III G2 line, while Vertiv launched the fifth-generation MergePoint Unity 2 in February 2026. Recommending the previous generations without that context is how a rack gets hardware that is already in its support sunset.
Below, the picks are organised by deployment reality first: how targets are cabled, how many remote sessions exist, how deep the chassis is, whether the platform speaks HTML5 or an old Java client, and what the interface modules add to the installation. Local, IP and console-drawer products are ranked separately because they are bought by different people for different reasons.
Quick Picks
| Use case | Pick | Architecture | Remote sessions | Video ceiling |
|---|---|---|---|---|
| Enterprise datacenter, mixed-generation estate | Raritan Dominion KX III G2 | Cat5 KVM-over-IP + CIM modules | 4 remote + 1 local | 1920×1200 @ 60 |
| New security-focused deployment | Vertiv Avocent MergePoint Unity 2 | Cat5 KVM-over-IP + modules | 2 remote | 1920×1080 24-bit |
| Two concurrent remote admins | ATEN KN2116VA | Cat5 KVM-over-IP | 2 remote + 1 local | 1920×1200 @ 60 |
| Shallow wall cabinet that still needs IP | Eaton Tripp Lite B022-U16-IP | 1U IP KVM, proprietary SPHD cabling | 1 remote | 1600×1200 @ 60 remote |
| Modern 4K60 rack of PCs and Macs | TESmart HKS1601-P23 | Local HDMI 2.0 + USB 3.0 | None | 4K60 4:4:4 |
| Budget 16-port HDMI rack | MT-VIKI MT-1601HKS | Local HDMI + USB 2.0 | None | 4K60 |
| Physical crash cart in the rack | Eaton Tripp Lite B020-U16-19-K | 1U LCD console drawer | None | 1280×1024 built-in |
| Expandable legacy VGA rack | ATEN CS1716A | Local VGA + USB/PS2 | None | 2048×1536 |
| 8 servers, cables included | IOGEAR GCS1808KIT | Local VGA + USB/PS2 | None | 2048×1536 |
| Branded local VGA for a colo rack | StarTech SV1631DUSBU | Local VGA + USB | None | 1920×1440 @ 60 |
What Makes a Great Rack-Mount Server KVM?
The first decision is not a model, it is an architecture. Everything else follows from it.
Local KVM. A local switch is a cable-management and console-sharing device. Sixteen machines run individual video and USB cables back to the chassis and one keyboard, mouse and monitor sit in front of it. No network stack, no encoding, no authentication. This is the right answer for a homelab rack, a burn-in bench or a media rack — and the wrong answer for anyone who needs to recover a server that has dropped off the network.
KVM-over-IP. An IP appliance adds an encoded remote video path, BIOS-level keyboard and mouse access, user accounts, and usually virtual media and centralised management. Enterprise IP units may also add LDAP, RADIUS or TACACS+, FIPS validation and redundant power. A cheap HDMI switch cannot reproduce any of that by virtue of switching video faster.
Cat5/Cat6 with interface modules. Higher-end ATEN, Raritan and Vertiv systems do not take sixteen video cables. Ordinary structured cabling runs from the appliance to a per-server module, which is what lets one chassis handle VGA, HDMI, DisplayPort and USB-C targets simultaneously. The trade-off is module cost: sixteen or thirty-two dongles are part of the installation budget, and that is the line item buyers most often discover late.
1U LCD console drawers. These are a physical workflow product rather than a video product. The display, keyboard, pointing device and switch live in one drawer that slides out of the rack like a crash cart. Their prices stay high because that niche has no cheap substitute, not because the panel is good.
Beyond architecture, six criteria separate a good rack KVM from a frustrating one:
- Exact remote-session count. "KVM-over-IP" tells you nothing about how many administrators can log in at once. It ranges from one to eight across the products below, and two remote users is a hard ceiling for a team of six.
- Rack depth. A nominal 1U product can be 6.3 inches deep or 27 inches deep. Local VGA switches are the shallowest; the ATEN KN2116VA is over 16 inches deep; an integrated 19-inch console drawer reaches 27 inches and will not fit a shallow wall cabinet.
- Target connectivity. Current CIM and module options cover VGA, HDMI, DVI-I, DisplayPort and USB-C on the enterprise platforms. Legacy local switches are VGA-first, which matters the moment a modern mini PC or a GPU with no analogue output enters the rack.
- EDID handling. Without persistent EDID, a host that loses its display signal can resize its desktop, reshuffle windows or fail to negotiate the intended resolution when the console focus returns. The KVM fundamentals guide covers why this behaves differently from a simple video switch.
- Lifecycle status. Enterprise KVM platforms run for a decade, which is good — until the model you are buying has already been superseded. Prior-generation appliances belong in a used-market bargain, not a new deployment.
- Realistic video ceiling. Enterprise IP KVMs deliberately sit at 1080p or 1920×1200 because that is what BIOS screens and remote administration need. Local HDMI switches advertise 4K60 because server racks of Mac minis and mini PCs need it. Neither number is a defect.
#1 Raritan Dominion KX III G2 — The Enterprise KVM-over-IP Standard
Raritan placed the original Dominion KX III into end-of-life on June 5, 2026, with end-of-support scheduled for December 31, 2028, so a new deployment belongs on the G2 generation. The DKX3G2-416 is the model that fits a full rack cabinet: 16 target ports, four simultaneous remote IP sessions and one local rack console, with the wider family scaling from 8 to 96 ports and from 1 to 8 concurrent network sessions.
Targets connect over structured Cat5e/Cat6 cabling to per-server CIM modules rather than sixteen video cables landing on the chassis. Current CIM options cover VGA, HDMI, DVI, DisplayPort and USB-C, plus PS/2, USB and serial use cases in the wider Dominion ecosystem — which is precisely why a mixed-generation estate can share one appliance. It is also the largest cost most buyers underestimate: sixteen modules are part of the deployment, not an accessory.
Remote video is built for administration rather than workstation work: up to 1920×1200 at 60 fps with high-quality colour modes and audio on supported configurations. Remote access is browser-oriented and Java-free, virtual media and Absolute Mouse Synchronization are supported, and CommandCenter Secure Gateway handles multi-appliance management. The platform includes firmware 4.1.0 plus JSON-RPC bindings and SDK support.
Key specs
- 16 target ports; four simultaneous remote sessions; one local console
- Family range: 8–96 target ports, 1–8 concurrent sessions
- 1U chassis, approximately 17.3 × 13.15 × 1.73 in (439 × 334 × 44 mm); ~57 W
- Redundant dual power supplies and dual LAN standard
- Cat5/Cat6 target cabling with VGA, HDMI, DVI, DisplayPort and USB-C CIM options
- Up to 1920×1200 at 60 fps; virtual media; Absolute Mouse Synchronization
- Java-free browser remote access; CommandCenter Secure Gateway; JSON-RPC/SDK
Pros
- The most complete remote-administration feature set in this class
- Mixed VGA/HDMI/DP/USB-C estates run through one chassis
- Redundant power and network paths are standard, not options
- CIM ecosystem and firmware support have a long track record
Cons
- Per-server CIM modules represent a substantial additional line item
- Video ceiling is administration-grade, not 4K
- Enterprise pricing and channel procurement, not retail
Verdict: the reference platform when several administrators need genuine BIOS-level out-of-band access to a mixed-generation rack, and the one to buy new now that the previous generation is in its support sunset.
Perfect for: datacenters, colocation cabinets and labs where vendor-independent emergency access matters as much as day-to-day console sharing.
→ Check the current price on Amazon
#2 Vertiv Avocent MergePoint Unity 2 — The Security-First IP Platform
Vertiv introduced the fifth-generation MergePoint Unity 2 in February 2026, which makes it the current MergePoint generation for a new enterprise build. The MPU2-2016DAC-400 offers 16 target ports and two digital remote sessions in 1U; the family covers 8 ports with one remote session, 16 ports with two, 32 ports with two, and 32 ports with four.
The platform keeps the Cat5/Cat6 plus interface-module architecture that the Avocent line is known for, and existing MPU access modules are explicitly supported — a meaningful migration detail for anyone replacing an older MergePoint appliance. Target modules cover VGA, DVI-I, DisplayPort and HDMI. Video tops out at 1920×1080 with 24-bit colour, which is the right ceiling for server administration and the wrong one if the rack is full of 4K workstations.
Security is the differentiator. Secure Boot, Vertiv-signed keys, TLS 1.3 and FIPS 140-2 support sit alongside TACACS+, RADIUS and LDAP authentication, and firmware authenticity checks are positioned as the main improvement over the previous generation. Remote access runs through an HTML5 viewer. Hardware includes redundant dual power supplies, dual 1Gb uplinks plus a dedicated management interface, a VGA local console and USB ports. TAA compliant, with a two-year standard warranty and expanded support options.
Key specs
- 16 target ports, two remote sessions, 1U
- Family: 8/1, 16/2, 32/2 and 32/4 remote-session configurations
- Cat5/Cat6 structured cabling; VGA, DVI-I, DisplayPort and HDMI modules
- Up to 1920×1080 at 24-bit colour
- HTML5 remote viewer
- Secure Boot, Vertiv-signed keys, TLS 1.3, FIPS 140-2, TACACS+/RADIUS/LDAP
- Dual redundant PSUs, dual 1Gb uplinks plus management port
Pros
- Strongest current security and firmware-integrity stack in the shortlist
- Backward compatibility with existing MPU access modules
- HTML5 access with no legacy client dependency
- Redundant power and network as standard
Cons
- Only two simultaneous remote sessions on the 16-port SKU
- 1080p ceiling, no 4K
- New-generation pricing through enterprise channels
Verdict: the pick when a rack handles regulated or high-security workloads and the remote access path itself has to be auditable and tamper-resistant.
Perfect for: enterprise datacenters, distributed edge sites, branch-office racks and compliance-driven environments.
→ Check the current price on Amazon
#3 ATEN KN2116VA — Two Remote Admins, Half the Enterprise Spend
The KN2116VA is the pragmatic middle of the IP segment: 16 Cat5 target ports, one local console and two simultaneous remote users, up to 512 systems when cascaded with additional units. It is a genuinely deep chassis — roughly 17.07 × 16.22 × 1.73 in (43.36 × 41.21 × 4.40 cm) and 12.25 lb — considerably larger than the local VGA switches further down this list, so check the cabinet before ordering.
The local console accepts DVI-D and VGA with two USB keyboard/mouse connections, and the port complement includes three USB ports, audio, a Laptop USB Console port, serial/RS-232, a PON port and dual Ethernet. Dual IEC C14 power inputs and dual LAN interfaces cover redundancy. Local and remote video both reach 1920×1200 at 60 Hz, with switching through pushbuttons, hotkeys and the GUI.
Virtual media, blade-server support, audio and CAC-related functions are part of the KN platform, and centralised management ties into ATEN's CC2000. Security includes FIPS 140-2 Level 1 support. The package ships with the switch, two power cords, mounting hardware, Lok-U-Plugs, an installation tool, feet and documentation.
Older KN-series units may require Windows or Java clients, depending on firmware. Check the client requirements for the exact firmware before deployment.
Key specs
- 16 RJ45 Cat5e/6 target ports; one local console; two simultaneous remote users
- Cascading up to 512 systems
- 1U metal chassis; ~17.07 × 16.22 × 1.73 in; 12.25 lb / 5.56 kg
- Local console: DVI-D and VGA, two USB keyboard/mouse connections
- Three USB ports, audio, Laptop USB Console port, RS-232, PON, dual Ethernet
- Dual IEC C14 power inputs, dual LAN
- 1920×1200 at 60 Hz local and remote; FIPS 140-2 Level 1
- Pushbutton, hotkey and GUI switching; virtual media; blade-server support; CC2000 integration
Pros
- Local console plus IP access plus Cat5 target modules at a fraction of Raritan pricing
- Two concurrent remote administrators
- Redundant power and network
- Cascades to 512 systems on the same platform
Cons
- Remote-client software requirements must be confirmed for the specific firmware
- 16.22-inch depth rules out shallow cabinets
- No HTML5 guarantee across all firmware branches
Verdict: the most sensible mid-tier IP appliance for a server room that needs two administrators online at once without Raritan-level capital outlay.
Perfect for: SMB server rooms, remote branch racks, labs and datacenters with a two-person admin team.
→ Check the current price on Amazon
#4 Eaton Tripp Lite B022-U16-IP — Shallow-Depth IP KVM
Most IP KVMs are deep. The B022-U16-IP is not: roughly 17 × 6.3 × 1.73 in at 5.4 lb, which makes it one of the few IP-capable rack switches that fits a shallow wall cabinet or a narrow network enclosure. That depth profile is the entire reason it earns a spot here.
It runs 16 target ports and supports one user, with daisy-chaining to add further B022-series switches beyond the first sixteen. Switching works through front pushbuttons, hotkeys, a local OSD and a remote toolbar. Local console video reaches 2048×1536, while the remote IP console tops out at 1600×1200 at 60 Hz with 24-bit colour. Up to 64 secure user accounts are supported, with USB/PS2 keyboard and mouse support and a shared USB peripheral port.
Target connectivity uses proprietary SPHD-18 connections carrying VGA plus USB or PS/2 rather than Cat5 dongles. That is simpler and cheaper per port than a module-based platform, but the cable ecosystem has its own quirks — the required console lead has tripped up buyers who already had the server cables in hand. The box includes two 6-ft USB/PS2 combo KVM cable kits, a console cable, an RJ11-to-DB9 firmware cable, rack hardware, a PSU and feet.
Key specs
- 16 target ports; one remote user; 1U
- Chassis approximately 17 × 6.3 × 1.73 in; 5.4 lb — shallow
- SPHD-18 server connections carrying VGA + USB/PS/2
- Daisy-chainable to expand past 16 ports
- Local console up to 2048×1536; remote up to 1600×1200 at 60 Hz, 24-bit colour
- Up to 64 secure user accounts; shared USB peripheral port
- Includes two 6-ft USB/PS2 combo KVM cables, console cable, firmware cable, rack hardware
Pros
- Fits shallow cabinets where most IP KVMs do not
- Simplest cabling model of any IP pick here
- Very low cost per port for an IP-capable switch
- Bundled cables reduce the deployment bill
Cons
- One remote user only
- 1600×1200 remote ceiling is the lowest in the shortlist
- Proprietary cables must be sourced from the right family
- VGA-centric; modern targets need adapters
Verdict: a narrow, cheap, shallow IP KVM for a branch rack where one administrator is enough and analogue video is still acceptable.
Perfect for: smaller server rooms, branch offices and homelab racks with a shallow enclosure.
→ Check the current price on Amazon
#5 TESmart HKS1601-P23 — Best 4K60 Local Rack KVM
This is where the rack stops looking like a datacenter and starts looking like a bench. The HKS1601-P23 switches 16 computers to a single HDMI display at 3840×2160 and 60 Hz with 4:4:4 colour, and supports lower-resolution high-refresh modes such as 1080p at elevated refresh rates. No IP stack, no LDAP, no virtual media — just clean, modern local switching.
Two details separate it from the generic HDMI switches. First, the USB data path runs at 5 Gbps on USB 3.0, rather than the USB 2.0/HID-only link found on budget rack KVMs, so storage and capture devices behave. Second, there is an EDID emulator on every input, which keeps host systems from believing their monitor was unplugged when the console focus moves.
Switching happens through an infrared remote, front-panel buttons, keyboard hotkeys and RS-232, and LAN control appears in current product marketing. Rack ears ship in the box alongside eight KVM cables, an IR remote and receiver, a 12V power adapter, an RS-232 connector and a manual. OS compatibility explicitly lists Windows, macOS, Unix plus Debian, Ubuntu, Fedora, Raspbian and other Linux environments. Hot-plug is supported.
Worth stating plainly: because every computer runs its own HDMI and USB cable back to the chassis, this is a local A/V-oriented switch rather than an enterprise management appliance. It should not be expected to provide remote BIOS sessions, audit trails or redundant supplies.
Key specs
- 16 computers to one HDMI display
- HDMI 2.0 output up to 3840×2160 at 60 Hz, 4:4:4 colour; high-refresh modes at lower resolution
- USB 3.0 data path rated at 5 Gbps
- EDID emulator on every input; hot-plug support
- Switching: IR remote, front-panel buttons, keyboard hotkeys, RS-232; LAN control marketed
- OS support: Windows, macOS, Unix, Debian, Ubuntu, Fedora, Raspbian, other Linux
- Includes eight KVM cables, IR remote and receiver, 12V adapter, RS-232 connector, two rack ears
Pros
- True 4K60 with 4:4:4 colour on every port
- USB 3.0 at 5 Gbps instead of USB 2.0 HID-only
- EDID emulation on all inputs
- Multiple switching methods including RS-232
Cons
- Only eight host cables bundled for a 16-port switch
- No KVM-over-IP, no LDAP, no redundant PSU
- Local-only, so it cannot recover a network-dead server
Verdict: the best local rack switch for a cabinet of modern machines where 4K60 matters and remote administration does not.
Perfect for: homelab racks, Mac mini and mini-PC clusters, workstation and test benches, media-production racks.
→ Check the current price on Amazon
#6 MT-VIKI MT-1601HKS — Best Budget 16-Port HDMI Rack KVM
The MT-1601HKS is the value answer to the same problem: 16 HDMI inputs to one HDMI console output, in a 1U 19-inch rack-mount chassis with ears included. The body measures roughly 432 × 167 × 45 mm, so it is compact in both dimensions — a useful trait in cabinets where the deeper enterprise appliances will not go.
Video supports 4096×2160 or 3840×2160 at 60 Hz with HDCP 2.0 advertised, and the ports carry EDID storage so resolution survives a switch. USB device sharing is USB 2.0, which is the main functional step down from the TESmart above: fine for keyboards, mice and USB receivers, tight for external storage. There is also a 3.5 mm audio output.
Switching covers front buttons, keyboard hotkeys, an IR remote and an automatic mode, with hot-plug support and no host software required. The bundle is unusually complete — 16 HDMI cables, 16 USB cables in several lengths, an IR remote, a 12V/2A PSU and rack hardware — which is a meaningful part of why the installed cost lands where it does. Windows, Mac and Linux are listed as supported.
Key specs
- 16 HDMI inputs, one HDMI console output
- 1U 19-inch rack mount; rack ears included; chassis ~432 × 167 × 45 mm
- HDMI up to 4096×2160 / 3840×2160 at 60 Hz; HDCP 2.0 advertised
- USB 2.0 device sharing
- EDID storage on the ports; 3.5 mm audio output
- Switching: front button, keyboard hotkey, IR remote, automatic mode
- Includes 16 HDMI cables, 16 USB cables, IR remote, 12V/2A PSU, rack hardware
Pros
- Complete 16-port cabling bundle in the box
- 4K60 on every input at a budget tier
- Compact 1U footprint
- Multiple switching methods without host software
Cons
- USB 2.0 only
- No EDID emulation across all ports, only storage
- No IP, LDAP, multi-user sessions or redundant power
Verdict: the cheapest credible way to put 16 modern machines behind one console, with the cabling already paid for.
Perfect for: budget homelabs, PC farms, repair and burn-in racks, monitoring stations.
#7 Eaton Tripp Lite B020-U16-19-K — Best 1U LCD Console Drawer
The B020-U16-19-K is not really a switch you compare with the others; it is a crash cart that lives in the rack. A 19-inch LCD, keyboard, touchpad and 16-port KVM share one 1U chassis measuring 19 in wide × 27 in deep × 1.75 in high and weighing around 31 lb. That 27-inch depth is the single most important number here — it eliminates shallow wall racks and short network cabinets entirely.
Capacity is 16 directly attached computers, expandable to 128 through daisy-chaining, with VGA plus USB/PS/2 server connectivity over SPHD combo cables. The built-in display runs at 1280×1024 at 60 Hz; the external console output reaches 2048×1536 at 60 Hz. Switching uses front buttons, hotkeys and a multilingual OSD, hot-plug is supported, and access control covers an administrator plus up to four local user profiles.
The included accessory set is generous: eight P778-006 6-ft USB/PS/2 combo KVM cables, a console cable, a power cord, rack mounting hardware, a firmware-upgrade cable and a grounding wire. There is no native KVM-over-IP on this model — Eaton's separate console families cover that — so this is a local-management product with a physical panel.
Key specs
- 1U drawer: 19-inch LCD, keyboard, touchpad and 16-port KVM in one chassis
- 19 × 27 × 1.75 in; approximately 31 lb
- 16 direct systems; up to 128 via daisy chaining
- VGA + USB/PS2 servers through SPHD combo cables
- Built-in display 1280×1024 at 60 Hz; external console up to 2048×1536 at 60 Hz
- Two-level access protection: administrator plus up to four local users
- USB 2.0; hot-plug; multilingual OSD
- Includes eight P778-006 6-ft combo KVM cables, console cable, power cord, rack hardware, firmware cable, grounding wire
Pros
- Replaces the whole crash cart, cables and all
- Multi-user local profiles with two-level access protection
- Generous cable bundle included
- Available and orderable through current channels
Cons
- 27-inch depth excludes shallow cabinets
- 1280×1024 built-in panel
- No integrated KVM-over-IP on this model
- Heaviest single item in this guide
Verdict: buy it for the rack workflow, not the picture quality — the value is having a screen and keyboard exactly where the servers are.
Perfect for: server racks that need an integrated physical console and have the depth to house it.
#8 ATEN CS1716A — Best Expandable Local VGA KVM
If a rack is full of real servers with VGA output and the priority is a simple local console, the CS1716A does the job with unusual headroom. Sixteen computers connect directly — the CS1708A is the 8-port sibling — and up to 31 additional units can be daisy-chained for a maximum of 512 systems. That scalability is exceptional for a switch this shallow, at roughly 43.3 × 16.0 × 4.4 cm.
Video reaches 2048×1536 with DDC2B, and ATEN's Video DynaSync stores monitor EDID so resolution problems are reduced as console focus moves between machines. Switching runs through front-panel pushbuttons, keyboard hotkeys and a multilingual OSD. USB/PS2 keyboard and mouse emulation lets non-selected computers boot normally — a detail that matters in a crash-recovery rack — and a front USB port shares a peripheral across hosts. Firmware is upgradeable and everything is hot-pluggable.
Platform support lists Windows, Linux, Mac and Sun. That documentation long predates Apple Silicon, so it should be read as general Mac compatibility rather than any form of M-series certification; modern Macs generally present standard USB HID plus video to a KVM, but the adapter chain, EDID behaviour and wake-from-sleep response all deserve a hands-on check. If IP access is the actual requirement, the CS1716i sibling adds remote access at 1920×1200 at 60 Hz — a meaningful distinction, since the two model names are easy to confuse.
Key specs
- 16-port local PS/2 + USB VGA KVM; CS1708A is the 8-port sibling
- 1U 19-inch rack-mountable; ~43.3 × 16.0 × 4.4 cm
- 16 direct computers; up to 31 daisy-chained units, 512 systems maximum (CS1708A: 256)
- VGA up to 2048×1536 with DDC2B; Video DynaSync EDID storage
- Front-panel pushbuttons, keyboard hotkeys, multilingual OSD
- USB/PS2 keyboard and mouse emulation for normal boot on inactive hosts
- Front USB peripheral-sharing port; hot-pluggable; firmware upgradeable
- Multiplatform: Windows, Linux, Mac, Sun
Pros
- Cascades to 512 systems from a shallow 1U chassis
- Video DynaSync EDID handling
- Keyboard/mouse emulation keeps inactive servers bootable
- Pushbutton, hotkey and OSD control without software
Cons
- No KVM-over-IP
- VGA and USB/PS2 focus; modern machines need adapters
- Mac compatibility documentation predates Apple Silicon
Verdict: the most expandable local switch in the shortlist for a rack built around analogue server video.
Perfect for: homelabs, traditional server racks, local crash-cart replacement, racks with substantial legacy VGA hardware.
→ Check the current price on Amazon
#9 IOGEAR GCS1808KIT — Best 8-Server Kit With Cables Included
For an eight-server rack, the IOGEAR GCS1808KIT is the least fuss: the cables that other manufacturers sell separately are already in the box. Eight mixed USB and PS/2 KVM cable sets, a console cable, a cascade cable, a firmware cable, a grounding wire, feet, a PSU and a rack kit are all included, which changes the real installed cost more than the unit price suggests.
The switch itself is a 1U 19-inch unit measuring 17 × 6.25 × 1.75 in. It handles eight computers directly and cascades to 64 in same-family configurations, with IOGEAR also documenting mixed cascading against the GCS1716 for larger installations. Video reaches 2048×1536 with DDC2B. Keyboard and mouse support USB or PS/2, there is a front USB 1.1 peripheral-sharing port, and switching happens through hotkeys, an OSD and front-panel buttons. Firmware is upgradeable and platforms include Windows, macOS, Solaris and Linux. The GCS1716 is the 16-port member of the same family for racks that need more ports.
A small single-board IP KVM appliance placed in front of this switch may cause keyboard and mouse USB-topology problems, so treat it as a conventional local KVM rather than a remote-access base.
Key specs
- 8-port local USB/PS2 + VGA rack KVM; eight KVM cable sets included
- 1U, 19-inch rackmount; 17 × 6.25 × 1.75 in
- 8 direct computers; cascades to 64 same-family (mixed cascading with GCS1716 documented)
- VGA up to 2048×1536 with DDC2B
- USB or PS/2 keyboard and mouse; front USB 1.1 peripheral port
- Hotkeys, OSD and front-panel button switching; firmware upgradeable
- Platforms: Windows, macOS, Solaris, Linux
- Package: four USB and four PS/2 KVM cables, console cable, cascade cable, firmware cable, grounding wire, feet, PSU, rack kit
Pros
- Complete mixed cable bundle in the box
- Genuine eight-server capacity with expansion to 64
- Broad OS support including Solaris and Linux
- Simple driverless operation
Cons
- VGA-only target connectivity
- 8 ports as shipped; 16-port racks need the GCS1716
- No IP management
Verdict: the cleanest low-friction 8-server local deployment, mostly because nothing extra needs ordering.
Perfect for: budget 8-server racks and mixed legacy labs where bundled cabling outweighs IP and 4K.
#10 StarTech SV1631DUSBU — Branded Local VGA for a Colo Rack
The SV1631DUSBU is a current-generation 16-port local rack KVM with no IP control, and its appeal is support rather than features. StarTech backs it with a three-year warranty and lifetime technical support, and the unit is TAA compliant — two things that matter in procurement-driven environments.
The 1U steel chassis is about 21.3 in wide with rack hardware installed, 7.1 in deep and 1.8 in high, with a core body of roughly 540 × 180 × 45 mm. Sixteen VGA/USB target ports feed one local USB keyboard, USB mouse and VGA monitor console. Maximum analogue resolution is 1920×1440 at 60 Hz, with widescreen up to 1920×1200 at 60 Hz. Switching runs through front-panel buttons, keyboard hotkeys and a multilingual OSD with auto-scan, and cascading extends control to 136 computers.
The practical sting is cabling: target KVM cables are not included and must be compatible StarTech two-in-one VGA/USB cables, which changes the deployed cost meaningfully. There is also no audio, no IP management and no CAC support. StarTech's older rack IP models, such as the SV1641HDIE and SV441DUSBI, are discontinued and should not be treated as current IP alternatives — that role belongs to the enterprise platforms earlier in this guide.
Key specs
- 16-port local VGA/USB rack KVM; no IP control
- 1U steel chassis; ~21.3 in wide with rack hardware, 7.1 in deep, 1.8 in high
- Core body approximately 540 × 180 × 45 mm
- 16 VGA/USB target ports; one local USB keyboard, USB mouse and VGA monitor console
- Maximum 1920×1440 at 60 Hz; widescreen up to 1920×1200 at 60 Hz
- Front-panel buttons, keyboard hotkeys, multilingual OSD, auto-scan
- Cascading up to 136 computers
- OS-independent, no drivers; TAA compliant; 3-year warranty and lifetime technical support
- Target KVM cables sold separately
Pros
- Vendor warranty and support depth unusual at this tier
- TAA compliant for procurement requirements
- Driverless operation across operating systems
- Cascades to 136 systems
Cons
- VGA only, no audio, no IP, no CAC
- Compatible KVM cables must be bought separately
- Legacy analogue resolution ceiling
Verdict: a low-risk branded local switch for a colocation rack of legacy servers where the support contract and compliance paperwork matter as much as the hardware.
Perfect for: local datacenter and colo racks, QA and burn-in labs, legacy server cabinets.
→ Check the current price on Amazon
Rack-Mount Server KVM Comparison Table
| Model | Class | Target ports | Remote sessions | Max video | Depth | Target cabling |
|---|---|---|---|---|---|---|
| Raritan Dominion KX III G2 DKX3G2-416 | Enterprise IP | 16 (8–96 family) | 4 remote + 1 local | 1920×1200 @ 60 | ~13.15 in | Cat5/6 + CIM modules |
| Vertiv Avocent MergePoint Unity 2 MPU2-2016DAC-400 | Enterprise IP | 16 (8/16/32 family) | 2 remote | 1920×1080, 24-bit | 1U | Cat5/6 + modules |
| ATEN KN2116VA | Enterprise IP | 16 (512 cascaded) | 2 remote + 1 local | 1920×1200 @ 60 | ~16.22 in | Cat5e/6 + modules |
| Eaton Tripp Lite B022-U16-IP | IP, shallow | 16 | 1 remote | 1600×1200 @ 60 remote | ~6.3 in | Proprietary SPHD-18 |
| TESmart HKS1601-P23 | Local HDMI | 16 | None | 4K60 4:4:4 | 1U with rack ears | Direct HDMI + USB |
| MT-VIKI MT-1601HKS | Local HDMI | 16 | None | 4K60 (4096×2160) | 1U, ~6.6 in | Direct HDMI + USB |
| Eaton Tripp Lite B020-U16-19-K | LCD console drawer | 16 (128 cascaded) | None | 1280×1024 built-in | ~27 in | SPHD combo cables |
| ATEN CS1716A | Local VGA | 16 (512 cascaded) | None | 2048×1536 | ~6.3 in | Proprietary KVM cables |
| IOGEAR GCS1808KIT | Local VGA | 8 (64 cascaded) | None | 2048×1536 | ~6.25 in | Bundled USB/PS2 sets |
| StarTech SV1631DUSBU | Local VGA | 16 (136 cascaded) | None | 1920×1440 @ 60 | ~7.1 in | StarTech 2-in-1 cables, not included |
Which Rack KVM Should You Buy?
A datacenter or colocation rack with several administrators. Raritan Dominion KX III G2 if the estate mixes VGA, HDMI, DisplayPort and USB-C servers and out-of-band recovery is a hard requirement. Vertiv Avocent MergePoint Unity 2 if security validation, firmware integrity and auditability drive the decision more than feature breadth.
A server room with two admins and a tighter budget. ATEN KN2116VA: two remote sessions, a local console, redundant power and network, and Cat5 target modules without the Raritan price.
A shallow wall cabinet that still needs remote access. Eaton Tripp Lite B022-U16-IP. Nothing else here fits 6.3 inches deep and still terminates an IP session, provided one remote user and a 1600×1200 ceiling are acceptable.
A rack of modern mini PCs, Macs or workstations. TESmart HKS1601-P23 for 4K60 with USB 3.0 at 5 Gbps and EDID emulation on every input; MT-VIKI MT-1601HKS when the budget is tighter and USB 2.0 peripherals are enough. Neither provides remote recovery, so pair the rack with a best docking station or BMC where possible.
A rack where a physical console must live in the cabinet. Eaton B020-U16-19-K — but confirm 27 inches of usable depth first, and accept that this model carries no native IP.
Legacy VGA servers, local access only. ATEN CS1716A for maximum scalability to 512 systems, IOGEAR GCS1808KIT for an 8-server rack where the cables should arrive in the box, and StarTech SV1631DUSBU where warranty, TAA compliance and vendor support carry weight.
Two adjacent products are worth knowing before you commit. The Vertiv Avocent AV3216 is a current 16-port KVM-over-IP alternative with two local users, one remote IP user, four USB 2.0 ports, LDAP/CAC support, virtual media and target modules for VGA, DisplayPort, DVI and HDMI — a lower-cost route into the Avocent ecosystem. And the Raritan Dominion KX IV-101 is frequently misread as a rack switch: it is a single-port, native-HDMI IP KVM supporting 4K at up to 30 fps and 1080p/1920×1200 at up to 60 fps, ideal for one high-performance workstation and out of scope for an 8/16/32-port rack.
Frequently Asked Questions
Q: Can a local rack KVM be placed behind a PiKVM, Comet or TinyPilot for remote access?
Sometimes, with caveats that are architectural rather than brand-specific. Small single-board IP appliances present themselves to the downstream KVM as USB devices, and a local switch that expects a plain keyboard and mouse may not negotiate a composite storage endpoint. With an MT-VIKI MT-1601HKS and a GL.iNet Comet, the setup may require disabling virtual media on the upstream appliance. The same class of keyboard/mouse topology problem has been reported when putting a network appliance in front of an IOGEAR GCS1808KIT. Treat this topology as viable but unguaranteed.
Q: Do I need KVM-over-IP if every server already has iDRAC, iLO or IPMI?
Not necessarily, and the honest answer is that a rack of servers with working BMCs already has out-of-band access. A dedicated KVM-over-IP platform still earns its place for mixed hardware, workstations and desktops, appliances with no BMC, failed or unreachable BMCs, installation and imaging labs, and as a vendor-independent emergency path that does not depend on a single vendor's management stack. If every machine in the rack is a current server with a licensed BMC, a local KVM plus the BMCs is often the more economical architecture.
Q: How much rack depth does a rack-mount KVM actually need?
Depth varies more than the "1U" label implies. The IOGEAR GCS1808KIT is about 6.25 in deep, the ATEN CS1716A around 6.3 in, the Eaton B022-U16-IP roughly 6.3 in and the StarTech SV1631DUSBU about 7.1 in. The Raritan DKX3G2-416 reaches approximately 13.15 in, the ATEN KN2116VA about 16.22 in, and the Eaton B020-U16-19-K console drawer runs 27 in deep. A product that fails a shallow wall cabinet does so on depth, not on rack units.
Q: What does a Cat5 KVM-over-IP deployment really cost beyond the chassis?
Interface modules. Raritan, high-end ATEN and Vertiv systems run structured cabling from the appliance to a per-server module rather than sixteen video cables into the chassis, and those modules are a material part of total system cost at 16 or 32 ports. The upside is genuine: one chassis can serve VGA, HDMI, DisplayPort, DVI and USB-C targets, cable management in a dense rack becomes far simpler, and migrating an existing installation is easier because current MPU access modules remain compatible with MergePoint Unity 2.
Q: Will a rack KVM work with a Mac mini or an Apple Silicon MacBook?
Generally yes, but with verification rather than assumption. A modern Mac presents standard USB HID plus HDMI or DisplayPort video, which is exactly what a KVM consumes. The variables are the USB-C or HDMI adapter in the chain, EDID behaviour, wake-from-sleep response, and the keyboard used for hotkeys. Manufacturer documentation on long-lived VGA products such as the ATEN CS1716A long predates M-series Macs, so that language should be read as general Mac compatibility, not as Apple Silicon certification. Local HDMI switches such as the TESmart HKS1601-P23 explicitly list macOS and Linux distributions in their compatibility statements.
Q: Is 4K60 pointless on a server rack?
For enterprise server administration, largely yes. BIOS screens, text consoles and remote management interfaces gain nothing from 4K, and platforms such as the Vertiv MergePoint Unity 2 and Eaton B022-U16-IP deliberately sit at 1080p or 1600×1200 because dependable administration matters more than pixel count. In a rack of Mac minis, mini PCs, workstations or media machines, 4K60 is the whole point, and 4K30-class ceilings — as on the CKLau-9116H — become a real limitation.
Q: How many administrators can be logged in at once?
It depends entirely on the model. The Raritan DKX3G2-416 supports four simultaneous remote sessions plus one local console, within a family that scales to eight. The ATEN KN2116VA and Vertiv MPU2-2016DAC-400 both support two remote users. The Eaton B022-U16-IP supports one remote user. Local switches such as the TESmart HKS1601-P23, MT-VIKI MT-1601HKS and StarTech SV1631DUSBU support no remote sessions at all. Matching this number to the size of the admin team is the most common specification mistake in this category.
Q: Why does EDID handling matter so much in a rack?
Because servers and workstations react to what they believe the monitor is. Without persistent EDID, the inactive host loses its display identity when console focus moves, so desktops resize, windows reshuffle, and resolution has to be renegotiated on switch-back. Products with explicit EDID handling solve this differently: the TESmart HKS1601-P23 uses an EDID emulator on every HDMI input, the MT-VIKI MT-1601HKS and ATEN CS1716A store monitor EDID through their own implementations, and the Raritan and Vertiv platforms manage it as part of their CIM and module architecture. Local switches with no EDID handling at all remain the rule at the bottom of the market.
Conclusion
Rack-mount KVM buying comes down to one decision made early: local, IP or console drawer. Get that right and the model choice becomes routine. The enterprise platforms — Raritan Dominion KX III G2, Vertiv Avocent MergePoint Unity 2 and ATEN KN2116VA — sell remote administration, mixed-target structured cabling and redundant hardware, at the cost of interface modules and a deep chassis. The local 4K switches — TESmart HKS1601-P23 and MT-VIKI MT-1601HKS — sell clean modern switching for racks of mini PCs and Macs, with no remote recovery at all. The 1U LCD drawer solves a physical problem that no switch solves on its own. And the legacy VGA local switches — ATEN CS1716A, IOGEAR GCS1808KIT and StarTech SV1631DUSBU — remain the cheapest way to give a rack of analogue servers a shared console, with scalability from 64 to 512 systems.
Two numbers should drive the final purchase: how many administrators need to be online simultaneously, and how deep the cabinet is. Everything else is negotiable. Buy the current generation where lifecycle status is documented, budget for the interface modules before signing off on a Cat5 platform, and skip 4K claims entirely if the rack only ever displays BIOS screens.
For the adjacent buying decisions, the two-computer KVM picks cover single-workstation setups, the dual-monitor KVM guide covers display topologies, and the docking stations with built-in KVM covers laptop-first hybrid docks. If the rack is still being planned end to end, the complete KVM buying guide is the place to start.
For most datacenter deployments, the Raritan Dominion KX III G2 remains the benchmark: four concurrent remote administrators, mixed VGA/HDMI/DisplayPort/USB-C targets over structured cabling, redundant power and network, and a platform that is current rather than in its support sunset.
→ Check the current price on the Raritan Dominion KX III G2
For a modern, local, 4K60 rack of mini PCs and Macs, the TESmart HKS1601-P23 is the value answer: 4K60 at 4:4:4, USB 3.0 at 5 Gbps, and EDID emulation on every input.
