Originally Posted by windfire
Good to have the author of that review here to explain.
And, I think the graphics subsystem in his sig rig speaks too.
Yeah, I bought all the GPUs I tested out of my own pocket, when I was unhappy with 1GB GTX460s in Surround. I also tested GTX470 SLI which was barely better than 1GB GTX460s - that extra 256MB of VRAM and those extra shaders do next to nothing because of the improved shader arrangement of the 460s.
However, I wouldn't recommend overclocking the GPUs in a Surround environment; Surround gaming pushes the GPUs harder than single screen Furmark, harder than Folding@Home. I could Furmark @ 1920x1200 with the cards on 875MHz @1.025v, and Fold at 925MHz @1.025v... but gaming in Surround I couldn't get stable past 780MHz at the same voltage... and if I bumped the voltage up, heat quickly became a serious
issue. I thought I had them stable at 815MHz at one point, but that proved erroneous; Just Cause 2 is one of the best stability tests in Surround, interestingly.
Originally Posted by tryagainplss
if the OP is gonna spend a lot on a GPU setup for surround.... I suggest a 6990 or a 590
While this might sound strange, I wouldn't recommend spending a lot on a Surround rig. At least, not on the GPUs.
Buy the best monitors you can - they will last longer than the GPUs will. Also make sure they have DisplayPort, so you can switch between EyeFinity and nVidia Surround as/when the mood takes you. I strongly favour the Dell U2410 for 16:10, or the U2311H if you want 16:9 (which I don't).
I remain somewhat dubious that nVidia are serious about Surround. That may sound odd, but I've talked to them a couple of times about issues I have that were there in their very first Surround capable driver, like Aero Preview breaking with the Taskbar horizontal and lack of an easy method to switch to Extended Desktop - and they are still there, large as life and twice as ugly, today in the most recent drivers. They are also failing to add any 'value added' features to Surround. It's like they sat down and said, "We need a competitor to EyeFinity" and when they got one, they stopped bothering.
While AMD is an attractive proposition for only needing one card, CrossFireX and EyeFinity do not always play ball with one another. Of course, with nVidia, if a game doesn't like SLI, it won't work with Surround. At all. Amnesia: Dark Descent is a perfect example.
That said, I'd look for a pair of 2GB GTX560s. I find 1.25GB or 1.5GB of VRAM too restrictive at 5760x1080+, so until the 3GB 580s drop in price, or someone comes out with 2.5GB GTX570s, I don't consider them worth buying. 560s mean you haven't outlaid a ridiculous sum, while allowing you to game comfortably on 99% of the games that will work in Surround. Crysis and Metro 2033 need graphics turned down quite a way to be comfortably playable.