A KVM switch lets one keyboard, mouse and monitor control several computers. It is a tidy way to run a desktop and a work laptop from the same desk, and the 4K versions keep text sharp on a modern display.
The six switches below range from two-computer HDMI boxes to a DisplayPort model and an eight-port rackmount unit. Resolutions, ports and cable details come from each listing page. We have not used these switches ourselves, and refresh-rate claims are the makers’ own.
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What to Look For
| Feature | Why it matters |
|---|---|
| Computer count | Two, four or eight inputs |
| Video input | HDMI, DisplayPort or USB-C must match your machines |
| Refresh rate | 4K@60Hz is common; some units only reach 4K@30Hz |
| USB ports | Shared ports for a keyboard, mouse and storage |
| Cables | Some boxes include them, others do not |
Specs at a Glance
| Switch | Computers and monitors | Video | Notes |
|---|---|---|---|
| UGREEN 4-computer | 4 PCs, 1 monitor | HDMI, 4K@60Hz | 4 USB 3.0 and 2 USB 2.0 ports; cables not included |
| UGREEN AK500 | 2 PCs, 2 monitors | HDMI, 4K@60Hz | 4 USB 3.0 ports; extend or mirror |
| UGREEN DisplayPort | 2 PCs, 1 monitor | DisplayPort, 8K@60Hz (title) | No EDID emulation; aluminum |
| MINIX K1 | 2 PCs, 1 monitor | USB-C in, HDMI out, 4K@120Hz | 100W PD; aluminum; 185 g |
| TESmart 8×1 | 8 PCs, 1 monitor | HDMI, 4K@30Hz | Rackmount; remote; LAN and RS232 |
| GREATHTEK 4-port | 4 PCs, 1 monitor | HDMI, 4K@60Hz | Metal body; button and second switching method |
The 6 Best 4K KVM Switches
1. UGREEN 4-Computer HDMI KVM Switch
Four computers share one monitor at up to 4K@60Hz, plus four USB 3.0 and two USB 2.0 ports for a keyboard, mouse, drives and a webcam. The case is ABS and polycarbonate, 8.5 by 3.15 by 1.06 inches. The listing says each computer needs an HDMI cable and a USB A to C cable, and the HDMI cables and the power adapter are not included. It is not supported with docking stations.
Suits: sharing one display across four machines. Strengths: six USB ports. Weaknesses: cables sold separately. Skip it if you use a docking station.
View UGREEN 4-Computer HDMI KVM Switch on Amazon
2. UGREEN Dual-Monitor HDMI KVM Switch AK500
Two computers control two monitors in extend or mirror mode at 4K@60Hz, with four USB 3.0 ports (three USB-A and one USB-C) listed by UGREEN at up to 5Gbps. The listing says it is HDMI only and not DisplayPort. The box is listed with four HDMI cables, two USB cables, a power adapter and a desktop controller.
Suits: a two-monitor desk shared by two machines. Strengths: cables included. Weaknesses: HDMI only. Skip it if your monitors use DisplayPort.
View UGREEN AK500 Dual-Monitor HDMI KVM Switch on Amazon
3. UGREEN 8K DisplayPort KVM Switch
A two-computer, one-monitor aluminum switch with DisplayPort video and four USB 3.0 ports. The title claims 8K@60Hz and the highlights mention 4K@240Hz, while the overview lists 3 ports, so confirm which mode your monitor supports. UGREEN says it has no HDMI interface and no EDID emulation, and that the DP cables and the USB-C power cable and adapter are not included.
Suits: high refresh gaming displays on DisplayPort. Strengths: aluminum body and four USB 3.0 ports. Weaknesses: no EDID emulation, cables not included. Skip it if you need HDMI.
View UGREEN 8K DisplayPort KVM Switch on Amazon
4. MINIX K1 USB-C KVM Switch
A 185-gram aluminum switch with two USB-C inputs for laptops, an HDMI output for one monitor, 4K@120Hz HDR and 100W PD 3.0 passthrough. The box has two USB-C cables, and an HDMI cable is not included; MINIX says 4K@120Hz needs an HDMI 2.1 cable and a monitor that supports it. It lists a 1-year warranty.
Suits: two USB-C laptops on one display. Strengths: 4K@120Hz and charging passthrough. Weaknesses: only two inputs. Skip it if your computers lack USB-C video.
View MINIX K1 USB-C KVM Switch on Amazon
5. TESmart 8-Port HDMI KVM Switch
An eight-input rackmount switch for one monitor, keyboard and mouse. It supports up to 3840 by 2160 at 30Hz only, with EDID emulation, two USB 2.0 hub ports, a remote control, auto scan, RS232, a LAN port and IP control, and ships with eight 5-foot KVM cables.
Suits: a rack or a bench with many machines. Strengths: eight inputs and control options. Weaknesses: 4K@30Hz only. Skip it if you want 60Hz at 4K.
View TESmart 8-Port HDMI KVM Switch on Amazon
6. GREATHTEK 4-Port HDMI KVM Switch
A metal-body switch measuring 8.3 by 3 inches that shares one monitor between four computers at 4K@60Hz with adaptive EDID. The title says three USB 3.0 ports while the bullets add a USB-C port, so the exact USB count is unclear. It offers two switching methods, including a button.
Suits: four computers and a small desk. Strengths: metal body and 4K@60Hz. Weaknesses: an unclear USB count. Skip it if you want a known brand.
View GREATHTEK 4-Port HDMI KVM Switch on Amazon
Setup Notes
- Count the cables each computer needs before ordering.
- Power the switch from its adapter where the maker asks for it.
- Use a high-speed HDMI 2.1 cable if you want 4K@120Hz.
- Keep the controller or button within reach of the keyboard.
Mistakes to Avoid
- Buying an HDMI switch for DisplayPort monitors.
- Expecting 60Hz from a 4K@30Hz model.
- Forgetting that cables may be sold separately.
- Connecting a docking station where the maker says it is unsupported.
4K KVM Switch FAQ
What does EDID emulation do?
It keeps your windows in place when you switch away from a computer. The UGREEN DisplayPort model lists none.
Do I need a USB cable for each computer?
Yes, each listing asks for a USB data cable per computer.
The Short Version
For four PCs on one monitor, the UGREEN 4-computer. For two monitors, the UGREEN AK500. For DisplayPort, the UGREEN DP model. For USB-C laptops at 4K@120Hz, the MINIX K1. For eight inputs, the TESmart. For a metal four-port box, the GREATHTEK.
