I'm running a pair of GTX 275's in SLI and am looking to make a worthwhile upgrade, that will keep me running games on ultra high for a few years like these things did. Would a single GTX 660 give me a large performance increase? I'm also not sure if my rig would bottleneck it. Here's my specs, I'd really appreciate any advice on this:
Intel Core i7 920 @ 2.67GHz
6GB DDR3 RAM @ 1600MHZ
Two 640 GB WD Caviar Blacks in RAID 0
NVIDIA GeForce GTX 275 x 2 in SLI
ASUS P6T motherboard
Is that from the nVidia website? I'd estimate a very small performance gain from a GTX660 or GTX660 Ti. Your SLI setup is probably quite close in performance to a single GTX480 / GTX570 / HD6970 / HD7850 if that's any help. If you need more graphics muscle, you'd want to step right up to a GTX670 for a noticeable improvement, or wait for next year's models.