I am running Vista 64 with 2 HD4770 CrossfireX and it shows up with GPUCaps and the demos work ok. Yes, I did install the current 10.7 Catalyst and the current 64 bit vista SDK for it. But I just don't see the box checked in version 0.4.4 I'm not a schooled tech, so please forgive if it is just due to an error on my part. Just thought I would let ya know . . .