Hi, I having some issues with my New 4870X2. My new X2 is not going to 3D clock for its second GPU, its allways at 2D clocks. CCC only show one card at overdrive menu. I did try GPU-Z and AMD GPU clock tool, and both show 2D clocks in one of the cards when running 3D, so a I tried forcing 3D clock with AMD gpu tool, but it cant set the clock, give me a error that clocks can be changed. My first OS is Vista 64, cant install 8-52-2, or 8-52-0, only official 8.8 didnt try yet older versions like 8.7. Under Vista 32 I was able to install one of the beta drivers, but still the same problem XP64 the same thing. Some say it could be my MB, Asus P5B Deluxe (PCI-E 1.1) but why this would keep one of the gpus from going to 3D clocks ? lack of energy in the PCI-E Slot ? My PSU is a PC Power Cooling 610, brand new.