Only one conclusion can be drawn by examining the graphs below: it looks like only one of the XFX 9800 GX2 GPU's is operating in Bioshock. It is likely that the NVIDIA driver team will get it working fairly soon -- but until then, playing Bioshock with a 9800GX2 would not be much different than playing it with a 8800 GTS 512MB. Actually, it is interesting to see precisely how close the performance of the 1 GPU 9800 GX2 matches up with a 8800 GTS 512MB.