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HDMI KVM Switch 8 Port, 4K@30Hz KVM Switch 8 Computers Share 1 Monitor and Keyboard & Mouse, with USB 2.0 Ports, Support Button Switch & Hotkey Switch & RS232, Adaptive EDID, Plug and Play
GREATHTEK

GREATHTEK HDMI KVM Switch 8 Port

Bottom line: The GREATHTEK HDMI KVM Switch 8 Port ($95.99 on Amazon as of 2026-10-07): Connects 8 computers to one monitor, keyboard and mouse; main trade-off: 4K tops out at 30Hz, too slow for smooth gaming or fast motion.

$95.99

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Buy on Amazon — $95.99 Compare to similar kvm switches

By , Founder & Editor-in-Chief · Listing data updated

Mike Perry — Hardware researcher since 2014. For retro PC hardware and period-correct parts, synthesises manufacturer documentation, community compatibility lists and marketplace listings rather than first-hand lab testing. Core beat: GPU performance across gaming, rendering, and local-LLM inference.

*Price sourced from Amazon.com. Last updated 2026-10-07. Price and availability subject to change.

Pros & Cons

Pros

  • ✓ Connects 8 computers to one monitor, keyboard and mouse
  • ✓ Three switching modes: front button, keyboard hotkey or RS232 command
  • ✓ Up to 4K@30Hz over HDMI 1.4, also works at 2K and 1080p
  • ✓ Shared USB 2.0 ports for scanners and flash drives across all 8 PCs
  • ✓ Ships with 8 USB-B cables, power adapter and RS232 terminal; no drivers

Cons

  • ✗ 4K tops out at 30Hz, too slow for smooth gaming or fast motion
  • ✗ HDMI 1.4 only, so no 4K@60Hz bandwidth
  • ✗ Hotkeys only work when keyboard and mouse use the dedicated K/M port
  • ✗ RS232 command set must be requested from the seller

Manufacturer description

The GREATHTEK 8 Port HDMI KVM Switch lets you run up to eight computers from one monitor, one keyboard and one mouse. That makes it a good fit for a home lab, a retro PC collection or a desk that mixes work and personal machines, and it saves you from a pile of extra displays and peripherals. You can switch computers in three ways. Press the front-panel buttons, use a keyboard hotkey, or send RS232 commands from a script or controller. Hotkey switching only works when your keyboard and mouse are plugged into the dedicated K/M port. For the RS232 command set, you need to contact the seller…

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SpecPicks Verdict

SpecPicks scored GREATHTEK HDMI KVM Switch 8 Port using a rating × review-volume × price-fit model applied to published specs and reviews across the kvm switches category. GREATHTEK's kvm switches lineup sits within the broader category mid-tier; price and specs are the deciding factors over brand loyalty here. Judge it on the specification table and the price rather than on sentiment: check the figures that decide your use case, then put it side-by-side with two or three close alternatives in the Compare tool before clicking through.

Common buyer scenarios for kvm switches of this kind: matching it to an existing build, replacing a failing part, or upgrading from a previous-generation equivalent. Check the spec table below against your current setup — particularly socket / form-factor / power-rating fields — and confirm compatibility on the retailer's listing before purchase. Prices and stock are set by the retailer and may have moved since this page was last updated.

Frequently Asked Questions

How many computers can this KVM switch control?

Up to 8 computers can share one HDMI monitor, one keyboard and one mouse. You choose the active computer with the front buttons, a keyboard hotkey or an RS232 command.

Does it support 4K at 60Hz?

No. The maximum is 4K@30Hz on the HDMI 1.4 standard. It also works at 2K and 1080p. For 4K@30Hz, your computers, monitor and HDMI cables all need to support that resolution.

Why don't the keyboard hotkeys work?

Hotkey switching only works when your keyboard and mouse are plugged into the switch's dedicated K/M port. If they are in a regular USB 2.0 port, use the front buttons to switch or move the devices to the K/M port.

Is it compatible with Mac and Linux?

Yes. The listing says it works with Windows, Mac and Linux, and adaptive EDID helps each computer detect the monitor correctly. No drivers are needed. It is plug and play.

What cables come in the box?

The box includes 8 USB-B cables, 1 power adapter and 1 RS232 terminal. HDMI cables are not listed as included, so plan to supply one for each connected computer and one for the monitor.

Key Features

  • 【HDMI KVM Switch 8 Port】The 8 Port KVM Switch HDMI allows 8 computers to share 1 monitor, keyboard, and mouse. You can freely choose to control 8 computers, making it easy to manage both work and personal computers. This KVM Switch is suitable for various usage scenarios, greatly saving space occupied by the device.
  • 【3 Switching Methods】 The KVM switch 8 computers supports 3 switching methods, including button switching, hotkey switching (keyboard switching), and RS232 commands. You can quickly switch between 8 computers at any time, which is simple and convenient. Please note that the keyboard and mouse are connected to the K/M port to support hotkey switching. If you need the RS232 command, please contact us through Amazon.
  • 【UHD 4K@30Hz】KVM switch 8 computers 1 monitor maximum support 4K@30Hz Resolution, backward compatibility, compatibility with 2K, 1080P, etc. Supports HDMI 1.4 standard. If the resolution needs to reach 4K@30Hz, your device and HDMI cable require support 4K@30Hz.
  • 【USB2.0 ports & Adaptive EDID】 The KVM switches comes with USB 2.0 ports for 8 computers to share USB devices such as scanners, USB drives, etc. KVM switch 8 port adaptive EDID, widely compatible with various systems such as Windows, Mac, Linux, etc. No driver required, plug and play.
  • 【After Sales Team】 This HDMI KVM switch comes with 8 USB-B cables, 1 power adapter, and 1 RS232 terminal. If you have any questions about our products, please contact us directly through Amazon and we will resolve them for you as soon as possible.

Full Specifications

BrandGREATHTEK
Colorcarbon black
ModelS7811H-B
MaterialMetal
TerminalRs232
Unit Count1 Count
Part NumberS7811H-B
Switch TypePush Button
Circuit Type8-way
ConnectivityUSB
Control TypeAdvanced
CompatibilitySwitch, Mac, Linux
Material TypeMetal
Mounting TypeRack Mount
Connector TypePlug In
Control MethodApp, Push Button, Remote
Operation ModeON-NONE-ON
Item Dimensions9 x 6.6 x 2.9 inches
Number of Items1
Specification MetFCC
Full listing titleHDMI KVM Switch 8 Port, 4K@30Hz KVM Switch 8 Computers Share 1 Monitor and Keyboard & Mouse, with USB 2.0 Ports, Support Button Switch & Hotkey Switch & RS232, Adaptive EDID, Plug and Play

Ready to buy?

HDMI KVM Switch 8 Port, 4K@30Hz KVM Switch 8 Computers Share 1 Monitor and Keyboard & Mouse, with USB 2.0 Ports, Support Button Switch & Hotkey Switch & RS232, Adaptive EDID, Plug and Play is listed on Amazon. Price, availability, shipping and returns are set by Amazon and its sellers — check the listing for current terms. SpecPicks earns a small commission on qualifying purchases — thank you for supporting independent review work.

Buy on Amazon — $95.99

*Price sourced from Amazon.com. Last updated 2026-10-07. Price and availability subject to change.

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HDMI KVM Switch 8 Port, 4K@30Hz KVM Switch 8 Computers Share 1 Monitor and Keyboard & Mouse, with USB 2.0 Ports, Support Button Switch & Hotkey Switch & RS232, Adaptive EDID, Plug and Play
$95.99
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