I've got two 8600GTSs in a 965P-DS4 mobo with a DVI-VGA adapter on one output from the second card. Both cards are visible in Device Mangler. I've created shortcuts for the two clients with -gpu 0 and -gpu 1 in them. GPU 0 runs okay, albeit only at 1600 PPD, but GPU 1 says it's not a supported card, try a new driver. This is cobblers as it's using the same driver as GPU 0. Oh, OS is XP32. So what do I need to get the second card working?