I'm in the market for a new GPU and after alot of reading and saving, I've decided on the MSI GTX 570. I currently own an EVGA GTX 285 standard edition. There's nothing wrong with my current card, I'm just looking to upgrade. My question is...can I use my GTX 285 in SLI with the GTX 570? Or can I only run 2 of the same cards in SLI?