I was not sure where to post this. I have read somewhere in internet that is was posible to run a ATI and a Nvidia card at the same time under Vista if we are using XP drivers... since i have Vista x64 y whent to try witch XP x64 drivers... Using Windows XP x64 drivers for both the ATI and Nvidia does indeed work!!! (you need to install them manually) First i tryied with a second monitor to enable the 8300IGP, them i figured out that was not needed, you need to just select the "grey" monitor in the display settings and select "extend my desktop ontro this monitor" and the secondary card will be enabled. I do the same in Windows 7... Using the Catalyst 8.12 XP x64 and forceware 178.13 for Xp x64 i was able to enable both cards! (i tryied with 180.84, but it give me a error). As you can expect, this dont come without problems... CCC fails to detect the radeon card, as well the nvidia control panel (so no cuda/physx support), i confirmed this with Badaboom... the games runs well, with not aparent problems or performance loss, the 3D acceleration where working in both cards, i confirmed this. GPU-Z give a error at launch. and finally, we also loss DX10... Ok, most of these problems seens to be driver based and not sure if can be fixed with modded drivers (maybe modders can take a look at this about what can be done?). Again, but something tells me that this is working because Vista fail to detected both card as CCC and Nvidia control Panel do.... BTW, Vista with SP2 Beta. BTW2, Installing the Vista x64 driver for the Radeon disable the nvidia, confirmed.