My rig: 2500k, 6950 2gb, 8 gb 1866. Used to be able to max all games at 1920 x 1080. Decided to add two more monitors and now I'm lucky if games run at medium settings. Do I need to add another 6950 in crossfire, or is there another solution?
This is why research is important. If you thought a single 6950 would max out games with triple monitors, you're dreaming. Especially 3 1080p monitors. You could get a nice FPS improvement by going something like triple 1680x1050 flipped sideways or even 1440x900... 3 1080p screens is a LOT of pixels.
It's even more extreme than 1920x1200 to 2560x1600, but here's some examples of what happens:
As you can see the FPS drops quite a bit. Crossfire 6950 should handle it well.
Thanks Wolfram. After looking at those charts I think two 6950s might not even be enough. Those charts show going from 2 million to 4 million pixels and I'm looking at over 6 million. I'm out of my league here I think.
I think you'd be much better with a 6950 trifire setup.I'm not sure that 6950 cf will give you playable framerates at games like metro without sacrifices.Even the 2560x1600 benchmark is barely playable.The same can be said about crysis.Also you will need a highly overclocked cpu with those if you don't want to be bottlenecked (although that problem is much worse at lower resolutions).