I too have to respond to swifty. I switched from an 8800 GTS 640 SLI setup to a 9800 GX2 setup because one of my cards failed and the price was right. The 9800 GX2 has the exact same issues as SLIed cards, any games that have SLI issues will have issues with this card. That being said, I have not had any issues with my card, and I regularly play Crysis Warhead, Dead Space, Oblivion, and Company of Heroes. No major framerate drops, microstuttering, etc. The heat generated by this card is closer to a single 8800 GTS 640 than an SLI 8800 640 configuration, IF your case, cables, and fans are configured well. At AUTO idle config my card runs at about 55C, and at AUTO load config it runs about 74C to 78C, about 6 degrees below my previous 8800 SLI setup. Manual fan settings at 100% drop my card into the high 40's at idle, and high 60's at load. I just downloaded the 180.48 drivers and expect a little improvement as far as framerates go, but I really don't need much more at this point as most of my gaming is done with full filters at 1440x900. At 1920x1200 I have to drop the AAxAF a couple notches (yes, this is where 512mb per card limits you) but I am hard pressed to find the difference in detail.
Dagger, help me out here.