I currently have two 550ti in SLI, looking to get the single (single GPU card) most powerful card. I have 700w power and an AMD 8150 8core @4.3 ghz. Other specs are in my signature below. Please provide a link comparing the two if possible.
These are the two I was thinking of ( if you know of others please list them aswell )
Both are overkill for your current resolution, that cpu will bottleneck a bit both the cards in some games.
That's not the best 7970, there's the 7970 Asus matrix platinum and the 7970 lightning from MSI.
Also for a 680 gtx, there's the msi lightning.