Guru3D: When we wrote our GeForce GTX 580 SLI (2-way) article, we where flabbergasted by the great performance scaling, yet we did notice some CPU limitation (processor bottleneck) here and there. That means with current generation processors, your GPUs might want to go a little faster, but the CPU is holding them back.
As such it might make more sense to get two products in SLI that are price wise more interesting while in theory the SLI performance should remain close to each other, especially monitor resolutions of 1920x1080 and below.
So the fine people from Gigabyte sent a 2nd card prior to the release of the GeForce GTX 570, and that product, my friends, is really interesting in 2-way SLI as this article is going to show you. We see tremendous scaling and while 349 EUR per card is not exactly pocket change money, for roughly 700 EUR you can create a fragtastic monster PC with two GeForce GTX 570 cards.