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As the title suggests I want to power two 2560 x 1440 monitors from one graphics card.

I am just about to send my second graphics card back to Amazon, so before I purchase a 3rd incorrect card I thought I should get some advice.

My latest card has dual DL-DVI output but only supports 2560 x 1440 on one output, the other maxes out at 1920 x 1080.

Can graphics cards with two Dual Link DVI adapters (or alternately, one Dual Link DVI and one DisplayPort support the a full 2560 x 1440 on both monitors, or does that depend on the graphics hardware and not only the connectors?

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Welcome to SuperUser. Product/purchasing recommendations are off-topic as per the FAQ. – Ƭᴇcʜιᴇ007 Oct 24 '12 at 19:53
Would this fall outside the purchasing recommendations rule, seeing as they are asking more "does this product exist" than "what's the best one to buy"? – techturtle Oct 24 '12 at 19:57
@techturtle - Not really, because this isn't hard to find. OP even knows what he needs - a card with dual dual-link DVI. (Of which there are lots.) – Shinrai Oct 24 '12 at 20:11
To answer your question, it's GPU-specific... some cards may support multiple dual link DVI but have a (total) framebuffer limit below the res you're trying to use. – allquixotic Oct 24 '12 at 20:29

You just need a video card that has two dual-link DVI ports.

The Geforce 600 series supports "4 independent 2D displays, or 3 stereoscopic/3D displays (NV Surround)"

AMD cards with eyeinfinity that have two dual-link DVI ports should also support this.

Here is an example of a card that has two dual-link dvi cables. This is not an endorsement of this product or a recommendation to buy. Just shop and look for a card that has two dual link DVI ports should be all you need.

It is possible to make a displayport connector into a dual-link dvi cable however that seems more expensive with adapters currently ranging in price from 60-$100

You could also opt for displays that support displayport 1.2 and a video card with that port as well.

"For example, a DP 1.2-enabled notebook will be able to drive two WQXGA (2560×1600) monitors or four WUXGA (1920×1200) units over a single connector, with each display acting as an independent screen with different resolution and timings at full uncompressed pixel performance with HDCP copy protection."

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