Hello, I have a question for you hardware proÂ´s. I have a Crossfire motherboard in my PC and I am thinking of buying a second Radeon 3870 for my computer. Does it have to be the same brand as my old one? I mean if it causes trouble with drivers an such. My card is mad by Sapphire with GDDR 4 and it reduces my chance to find one on the used market if I have to search for a Sapphire specifically.