Looking for some advice here, I'm gonna be updating my PC to a Z68 or X79 system, running either a OC'd 2700k or OC'd 3820 . (may go with 3930K, who knows.)
Any way I just upgraded my monitor to a Dell Ultrasharp 30" running 2560x1600 resolution. So I'm planning to go SLI. I currently have a EVGA GTX 570 2.5 gb card that is still in EVGA's set-up 90 day limit. So my 2 options are:
Obviously the 580's are faster cards but at 2560x1600, I'm wondering if the 2.5 gb 570's would preform better with the extra Vram. And yes I realize a pair of EVGA GeForce GTX 580Classified ULTRA 3 gb would be the best of both worlds, but setup only lets u upgrade to reference model cards and unfortunately my GPU decided to quit out on me 2 months b4 my CPU so I'm stuck with what I have.
I don't think the vram makes one heck of a lot of difference.
I am using a EVGA GTX580 superclock with the default 1.5gb vram.
I game on a 2560 x 1600 monitor, and the frame rates seem satisfactory.
Also connected is a second side monitor of 2560 x 1600.
In the past, I connected that second side monitor to a cheap second card, but it really made no difference.
With the upcoming kepler cards, I would not take any premature actions. You will probably do fine with your GTX570.
If the step up to a GTX580 is financially attractive, then so much the better.
Whenever kepler arrives, you can then decide if sli and another GTX570 or GTX580 is attractive, or
you can market your current card in favor of whatever is new.