Ok. I have just spent a big buck on my 2 new Ati Radeon HD 4870 X2. Ok so i have 2 of them connected with a crossfire cable, but vista is only showing one of them. I want my 4gb of gddr5 please help!! I have bought a new crossfire cable, and im not low on my power supply i have a 1000wat power supply. (It was working a week ago.)