I have 3 Dell U3014 Monitors (30 inch screens). The max/recommended resolution for these monitors is 2560x1600.

I have all 3 plugged into the same video card - a Sapphire Radeon HD 6870. I'm using both of the DVI ports and a DisplayPort to DVI adapter so all 3 monitors have DVI (dual link) cables running to them. I previously used this exact setup to power 3 24-inch screens, each at 1920x1200 and the card did that fine with no problems at all.

So I just hooked these 3 30" monitors up and turned my machine on and only the main/center monitor (#3) is displaying at 2560x1600 - but the 2 side monitors (1 and 2) are showing at 1920x1080 and windows won't let me increase the resolution for them - the highest it displays in the drop down for screens 1 and 2 is 1920x1080. display properties

I updated my graphics drivers to the latest version thinking that might help but it didn't. Is there anything else I can try to do or do I just need to suck it up and go buy a better graphics card? If I need a better graphics card - what kind of card do I need? Or do I just need to add a second card with certain ports?

It seems like these monitors need a card with 3 dual-link DVI ports or 2 dual-link DVI and a DisplayPort I can use my existing adapter on. I'm thinking that because my current card only has 1 dual-link DVI and one single-link DVI that it is limiting the resolution I can have across all 3 monitors - could that be right?

closed as off-topic by JakeGould, Toto, bertieb, Rajesh S, Pimp Juice IT Oct 21 '18 at 21:29

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  • Are you absolutely sure your DisplayPort/DVI converter is Dual-Link? – Daniel B Jun 7 '14 at 6:43
  • I'm not sure, but I do have a DisplayPort to mini-DP adapater I could try using instead of the DP/DVI converter. Maybe give that a try? – jamauss Jun 7 '14 at 6:55
  • So I tried unplugging the DP/DVI adapter and just running a DisplayPort cable from the card to one of the monitors and that monitor isn't even detecting a signal from the DisplayPort cable so I guess that isn't going to improve anything for me. – jamauss Jun 7 '14 at 7:40
  • Try using the Catalyst Control Center for configuring your monitors. – d3dave Jun 7 '14 at 9:35
  • I did try using Catalyst and that wouldn't let me set the resolution any higher either. I've done a little research and the problem seems to be with the port combinations I have with this card. – jamauss Jun 7 '14 at 19:13