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Buyer's guides, technical explainers and how-tos for the EMS Xtreme range — written by the team that specs these systems every day.
The Xtreme capture card family spans four ranges, and the right one depends on your source signal and how many channels you need on one card, not just on resolution.
XtremeDV is the current-generation range, and the one to specify for any new 4K project. UHD2 and DP2 give you dual-channel true 4K60 4:4:4 over HDMI 2.0 or DisplayPort 1.2; SDI4 gives four channels of 3G-SDI for broadcast; HD4+ mixes two 4K and two HD channels on one card for medical and security applications with mixed-resolution sources.
XtremeAV and XtremeRGB are earlier-generation ranges still in active use for HD, SD and analogue capture — SDI, DVI, VGA, Composite and Component. They're the right call when you're matching existing infrastructure that predates 4K, or where full 4K performance genuinely isn't needed and the lower cost matters.
XtremeLC is the compact range — single or dual-channel HDMI/SDI on a smaller, lower-cost card, built for lecture capture, embedded systems and any build where PCIe slot space or budget is tight.
If you're still not sure, our Build My System tool will walk you through the choice alongside a compatible chassis and graphics card, or just get in touch with your source signal and channel count.
Every Xtreme card states a PCIe generation and lane count (e.g. "8-lane PCIe Gen.3") and a maximum data rate. Two things determine whether a card will actually hit that number in your system: how many lanes the physical slot provides, and which PCIe generation the slot and card both support — a Gen.3 card in a Gen.2 slot will still work, but is capped at Gen.2 bandwidth.
This matters most in VSN chassis with a mix of capture and graphics cards competing for backplane bandwidth. Our Express9-G3 and Express11-G3 backplanes use PCIe 3.0 switching to give every slot up to 8GB/s bidirectional bandwidth — as a rough guide, that's enough headroom for around 14 full HD streams at 60Hz/32bpp in either direction between chassis, which is why the -G3 backplanes are worth specifying even with older Gen.1/Gen.2-rated cards if you're daisy-chaining an expansion chassis.
If a wall is dropping frames or showing tearing on specific channels, checking whether the relevant card is seated in a full-bandwidth slot — rather than a lane-limited one further down the backplane — is one of the first things our support team checks.
Getting genuine 4K60 with full 4:4:4 chroma sampling — not scaled, not subsampled — depends on getting three things right together: the card, the cable, and the driver mode.
Card: only our XtremeDV-UHD2 and XtremeDV-DP2 deliver true 4K60 4:4:4 on both channels simultaneously. Older XtremeAV/XtremeRGB cards top out at HD or a single 4K channel at reduced chroma — check the spec table on the individual product page before assuming "4K" means the same thing across the range.
Cable: full-bandwidth HDMI 2.0 (18Gbps) needs a certified Premium High Speed cable, especially past 2 metres. A cheap or overlength cable is the single most common cause of a "4K signal but no lock" support call.
Driver mode: our unified Windows/Linux driver exposes capture resolution and colour depth to any DirectShow or Media Foundation-compatible application — confirm your capture software (OBS, vMix, Wirecast, Panopto) is actually requesting the 4:4:4 mode rather than defaulting to a lower-bandwidth 4:2:0 setting, which some encoders select automatically to reduce CPU load.
Standard covers a single video wall with the full drag-and-drop source placement, templating and layout recall feature set — the right tier for most single-room control centre or signage deployments.
Pro adds multi-wall support from one VSN system, full User Rights Management (restricting sources, layouts and desktop capture per Windows login), and the web interface for remote layout control from a browser, phone or tablet.
Pro+Milestone and Pro+Genetec add direct integration with those third-party video management systems, letting camera feeds already configured in Milestone or Genetec appear as VigiControl sources without a separate capture path. Only relevant if the site already runs one of those VMS platforms — confirm which one before specifying, since the two integrations aren't interchangeable.
Every EMS video wall follows the same basic path, whatever the scale: Capture → Process → Display.
A Xtreme capture card (or an Active SQX card for IP/network streams) brings each source signal into the system, converting it into a format the host can work with and triple-buffering it in onboard memory for tear-free output. From there, VigiControl 10 handles placement — deciding which region of the wall each source appears in, at what size, and whether it's part of a saved layout template. Finally, an XtremeImage graphics card renders that composed output across the physical displays, with EMS's driver handling bezel correction, rotation and multi-screen spanning so the wall reads as one continuous canvas rather than a grid of separate monitors.
On a VSN chassis system, all of this happens inside one box; on larger installations, a VSNV3 Expansion Chassis extends the same signal path across multiple physical chassis with full gen-locking, so there's no visible seam between a card in the master unit and a card in an expansion chassis three slots away.
Start from channel count, not from budget. Count every capture card and every graphics card your wall will need on day one, then add at least one or two spare slots for future growth — video walls almost always grow.
If that total comfortably fits in 5 slots, the 5-slot Xtreme-VSNV3 is the more cost-effective choice and takes up less rack space. Once you're past 5 and heading toward 9 or 10, go straight to the 11-slot Xtreme-VSNV3 rather than planning to add an expansion chassis immediately — it's simpler to spec once.
The Xtreme-VSN1192 sits on a different axis entirely — it's the previous-generation platform (dual Xeon E5-2618L v3, Windows 10 LTSC only), kept in the range specifically for its 128GB memory ceiling, which is higher than the current VSNV3's Xeon tier. Specify it only where that memory headroom is a real, stated requirement, or where you're extending an existing VSN1192 estate — for any new deployment without that specific driver, the current-generation VSNV3 is the better default, and it needs a different expansion chassis (VSN1100X, not the current VSNV3 Expansion Chassis) if the project grows.
Still unsure? Build My System will total up your slot requirement automatically as you add cards, and warn you if you've overfilled the chassis you picked.
Our support team specs these systems every day — get in touch with your application and we'll point you at the right hardware.
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