Hi, I have 2 XFX Radeon HD 5870s in crossfirex, and in catalyst under CrossFireX Diagnostics, its just a blank box, when looking at the Overdrive tab under my 2nd gpu, in Catalyst, the 2nd gpu looks inactive, and in AMD Overdrive it's the same, the memory, memory type, part number, and everything is recognized, but it seems like it's not activated =S