Question 1

What's the difference between a 2-in-1 and a 4-in-1 KVM cable?

Accepted Answer

A 2-in-1 KVM cable carries video and USB signals only, while a 4-in-1 adds 3.5mm audio and microphone connections. The 2-in-1 is sufficient for most basic setups where you only need to switch keyboard, mouse, and display between computers. The 4-in-1 is the better choice if your KVM switch supports audio switching and you use a headset or speakers that need to follow the active computer — common in call centres and multimedia workstations.

Question 2

Can I use any KVM cable with any KVM switch?

Accepted Answer

Not always — compatibility depends on both the connector type and, in some cases, the switch manufacturer's signalling protocol. Standard USB + VGA or USB + HDMI cables are broadly interchangeable across brands. However, Cat5e/6 KVM adapter cables (such as ATEN's CPU modules) use proprietary signalling and must match the switch brand. Always check the switch's compatibility list before purchasing, particularly for anything beyond a basic passive cable.

Question 3

How long a KVM cable can I use before signal quality degrades?

Accepted Answer

For analogue VGA connections, signal degradation becomes noticeable beyond 5 metres — expect ghosting or softness at longer runs. Digital connections (HDMI, DisplayPort) are more resilient but passive cables still have practical limits of around 5–7 metres before signal loss occurs. If you need a longer run, use a Cat5e/6 KVM extender solution rather than a longer passive cable. StarTech.com's rackmount console cables are engineered for their specific length ratings and should not be substituted with generic leads.

Question 4

Are KVM cables from one brand compatible with switches from another brand?

Accepted Answer

For standard passive cables (USB + VGA, USB + DVI, USB + HDMI), cross-brand compatibility is generally good. StarTech.com cables in particular are widely used with ATEN, Belkin, and Raritan switches without issue. The exception is proprietary adapter cables — ATEN's Cat5e CPU modules, for example, are designed specifically for ATEN switches and will not function correctly on a competitor's unit. When in doubt, buy the cable recommended by your switch manufacturer.

Question 5

Is it worth paying more for a shielded KVM cable?

Accepted Answer

In a data centre or server room environment, yes — double-shielded cables with braided screening are worth the premium. EMI from UPS units, dense networking equipment, and power distribution units can cause visible interference on unshielded VGA cables and data errors on USB connections. For a home office or small business setup with a single KVM switch, standard shielding is more than adequate and the extra cost is not justified.

Question 6

What KVM cable do I need for a rackmount console (KVM drawer)?

Accepted Answer

Rackmount KVM consoles (1U drawer-style units) typically require dedicated console cables rather than standard desktop KVM leads. StarTech.com's USB KVM cables for rackmount consoles — available in 1.8 m, 3 m, and 4.6 m lengths — are specifically designed for this application and include the correct connector configuration for 1U console drawers. Check whether your console uses a proprietary connector or a standard USB + video combination before ordering.

Question 7

Should I avoid cheap, unbranded KVM cables?

Accepted Answer

For basic VGA or DVI setups, a well-reviewed budget cable can work adequately — but we'd be cautious. Unbranded KVM cables frequently cut corners on shielding and connector quality, which leads to intermittent USB disconnections, image noise, or outright incompatibility with specific switch models. Given that the branded options from StarTech.com start from 14 £, the saving on a no-name alternative rarely justifies the risk, particularly in a professional environment where downtime has a real cost.

KVM Cables Price Comparison

Vertiv Avocent MPUIQ-VMCDP KVM Interface Adapter DISPLAYPORT, USB 2.0 Black

DELL A7485901 KVM cable Black

ATEN USB - DVI to Cat5e/6 KVM Adapter Cable (CPU Module)

Digitus Modular KVM switch, single port

ATEN R W/AUDIO & SMART CARD SUPPORT

Vertiv Avocent MPUIQ-VMCHS cable interface/gender adapter VGA (D-Sub) USB 2.0 Black, Blue

ATEN 2-Port USB Boundless Cable KM Switch

Belkin F1D9020B06T KVM cable Black 1.8 m

Belkin F1DN2CCBL-HH10t KVM cable Black 3 m

Belkin F1D9019B06T KVM cable Black 1.8 m

ATEN USB - VGA to Cat5e/6 KVM Adapter Cable (CPU Module)

Belkin F1DN2CCBL-HH6T KVM cable Black 1.8 m

Belkin F1DN1CCBL KVM cable Black 1.8 m

Belkin F1DN1CCBL KVM cable Black 3 m

ATEN DisplayPort Console Converter

ATEN USB - VGA to Cat5e/6 KVM Adapter Cable (CPU Module)

ATEN USB - VGA to Cat5e/6 KVM Adapter Cable (CPU Module)

ATEN PS/2 - VGA to Cat5e/6 KVM Adapter Cable (CPU Module)

Belkin F1DN1MOD-HC-H06 KVM cable Black 1.8 m

ATEN USB - VGA to Cat5e/6 KVM Adapter Cable (CPU Module), with Virtual Media Support

Belkin F1DN2MOD-CC-H06 KVM cable Black 1.8 m

Belkin F1DN2MOD-HC-P06 KVM cable Black 1.8 m

Belkin F1DN2MOD-HC-H06 KVM cable Black 1.8 m

Belkin F1DN2MOD-CC-P06 KVM cable Black 1.8 m

KVM Cables Price Comparison