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If you’re setting up extra screens for work, gaming, or digital signage, DVI splitters and switches can be surprisingly handy. Even with HDMI and DisplayPort reigning supreme, DVI remains common in older monitors, projectors, and some pro video gear. A splitter lets one DVI source feed multiple displays, while a switch lets you send several DVI sources to one screen — like having a traffic controller for video signals. Why choose DVI? Because it’s reliable, well-understood, and in many installations it’s the simplest way to get stable 1080p or 1920x1200 video without fuss.
Before you buy, know your connectors. DVI comes in three main flavors: DVI-D (digital only), DVI-I (integrated digital and analog), and DVI-A (analog only). Each can be single-link or dual-link. Dual-link supports higher resolutions, so if you need crisp displays beyond 1920x1200, look for dual-link models. The physical connectors also vary: a DVI connector with a flat pin is usually DVI-D or DVI-I, while extra pins mean dual-link. It’s not just alphabet soup — picking the wrong type can leave you with no picture.
Think of DVI-D as a pure digital highway — great for modern signals. DVI-I is a hybrid road that carries both digital and analog traffic. If your displays are older CRTs or VGA-only monitors, DVI-I can be handy with the right adapter. For most modern LCDs and projectors, DVI-D single-link is enough, but for higher resolutions or multi-monitor cloning at quality, dual-link DVI-D is the safer bet.
Which do you need — a splitter or a switch? If you want the same image on two or more screens (mirroring), choose a splitter. If you have multiple sources (a laptop, a desktop, a media player) and want to pick which one shows on a single monitor, choose a switch. There are also matrix units that let you route multiple inputs to multiple outputs, but those tend to be pricier and used in control rooms or pro AV setups.
Passive splitters are cheap but limited: they duplicate the signal electrically and often only work with short cable runs and modest resolutions. Active splitters have signal boosters or repeaters and will drive multiple monitors at longer distances with better quality. If your cables are longer than a few feet or you need crisp 1080p on multiple displays, spend a bit more on an active unit — it’s like choosing a booster amp for your video signal.
Match the splitter or switch to the resolution you intend to use. Many DVI splitters advertise 1080p or 1920x1200 support; dual-link units can go higher. Cable length matters: DVI over short, high-quality cables (under 6 feet) usually behaves well, but beyond that you may need active repeaters. EDID (Extended Display Identification Data) management is another factor — good switches preserve EDID so sources know what resolutions the displays can handle, avoiding mismatches.
As a rule of thumb, keep passive DVI runs under 6 feet for reliable results. For lengths between 6 and 20 feet, use high-quality shielded cables and consider active splitters or boosters. If you’re stretching beyond 20 feet, look into repeaters or converters. Think in terms of feet and inches when planning your layout so your signal stays strong from source to screen.
Shopping in the UK gives you a wide range of retailers that routinely stock DVI splitters and switches. Whether you want next-day delivery, extended warranties, or trade-grade gear, these stores cover most needs and budgets. Below are some reliable options where you can compare products, prices, and delivery choices.
Amazon UK is often the quickest place to find a broad range of DVI splitters and switches, from budget passive splitters to branded active units. The advantage is user reviews — they help you spot real-world reliability and compatibility issues. Prime shipping can get you a replacement fast if you need to swap gear during a setup weekend.
Currys stocks common DVI adapters, switches, and basic splitters. If you want to see a cable or adapter in person, visiting a store can help you check connectors and cable thickness. Their staff can often help with simple compatibility questions, and they sometimes bundle cables with adapters at attractive prices.
These specialist retailers cater to workstation builders and gamers. They carry high-quality branded splitters and switches such as StarTech, Lindy, and Aten. If you’re after dual-link DVI gear or professional-grade matrix switches, these shops are excellent places to compare specs and warranty terms.
For commercial installs or AV installers, RS Components and CPC (part of Farnell) offer industrial-grade DVI matrix switches, long-reach repeaters, and bulk cable. Their products are built for long-term deployments where reliability matters more than price — think conference centers and digital signage networks.
Box.co.uk and Novatech are useful for hybrid setups, and Richer Sounds occasionally stocks home AV switches suitable for living-room media centers. Argos can be a convenient option for basic splitters in a pinch, especially when you want to pick up in-store the same day.
Certain names stand out in the DVI world. StarTech is known for reliable adapters and active splitters with good documentation. Lindy has a strong AV reputation for pro cables and switches. Aten offers robust matrix switches and industry-grade KVM gear. Tripp Lite and Gefen also make solid AV switching solutions. Picking a recognized brand usually buys better build quality and support, which pays off when you’re wiring multiple displays.
Budget options are tempting and fine for casual home use, but they often skip active buffering and EDID handling. If you’re running signage, presenting in a boardroom, or relying on a multi-screen workstation, invest in a professional brand that lists EDID management, signal amplification, and warranty support. That’s the difference between a temporary fix and a solution that just works.
Installation is usually straightforward, but a few best practices will save you headaches. Power active splitters from a reliable outlet and plug sources into the switch or splitter before powering on displays. Boot order can matter: sometimes turning on displays first helps the source read the EDID correctly. Label cables and ideally use short, high-quality cables for the portion closest to the splitter or switch to reduce signal loss.
Cable pathing affects signal integrity. Avoid running DVI cables parallel to heavy power cables for long runs; cross them at right angles if they must intersect. Use cable ties and trunking to keep runs neat and prevent tugging. For runs longer than 10 feet, test every connection before finalising the installation to catch any weak links early.
After you connect everything, run a quick verification: check each input and output for signal, cycle through resolutions, and look for flicker or blanking. If one display shows a lower resolution, check EDID settings and make sure the switch supports the highest common resolution of all connected monitors. A simple test with a portable laptop can help isolate whether the issue is the source, the switch, or the cable.
Even with the right hardware, you may run into issues: no signal, black screens, or unstable resolutions. Often the culprits are mismatched connectors, worn pins, poor cable quality, or EDID negotiation failures. Start with the basics — swap cables, try different inputs, and verify each monitor works when connected directly to the source.
Check that the splitter is powered if required, and ensure cables are seated firmly. For long cable runs, try a shorter cable to rule out attenuation. If the problem persists, try a different source device. Sometimes a firmware update for professional switches corrects handshake issues, so check the manufacturer’s support pages.
If one monitor shows a lower resolution or a fuzzy image, examine EDID settings. Some switches let you lock EDID to a particular monitor or emulate a standard EDID to prevent the source from picking a lower common denominator. Also confirm you’re using the correct DVI type (single-link vs dual-link) for the target resolution.
Expect to pay anywhere from budget-friendly amounts for a simple passive splitter to more for active or branded splitters. In the UK market, simple passive splitters can be found for modest sums, while active splitters and switches from recognised brands often cost more but offer far greater reliability. Matrix switches and enterprise AV gear are at the top end of the scale, often priced for business customers rather than casual home users.
Look for refurbished or open-box pro equipment from reputable sellers if you need high-end features on a budget. Compare delivery and warranty options across stores like Amazon, Scan, and RS Components. Read user reviews for real-world reliability and watch out for sellers who list vague specs — clarity on single-link vs dual-link and EDID support is essential.
If your goal is future-proofing, consider converting to HDMI or DisplayPort for higher resolutions, audio embedding, and longer cable runs with active extenders. However, for many existing installations with DVI displays, a well-chosen splitter or switch saves time and money, letting you extend the life of perfectly good monitors without forcing a full refresh.
If you have mixed inputs — some DVI, some HDMI — there are reliable converters and hybrid switches that handle both. Be mindful that conversions can introduce complications, especially with HDCP-protected content or when audio needs to be passed through. For basic mirroring or KVM-style switching, DVI solutions remain a dependable choice.
Take stock of your monitor types, required resolution, cable lengths in feet, and whether you need mirroring or source switching. Pick reputable UK retailers and brands, and opt for active splitters if you have multiple or distant displays. Keep spare adapters handy for unusual connector types, and label everything during installation to simplify future troubleshooting. With the right approach, a DVI splitter or switch will quietly do its job and let you focus on what matters — your work, presentation, or play.
Conclusion: DVI splitters and switches remain practical, economical tools for many UK setups, from home studios to small business AV. Know your connectors, plan in feet and inches for cable runs, and buy from reputable retailers to get gear that lasts. With a bit of planning, you’ll have a seamless multi-display setup that doesn’t break the bank.
