Hello, I'm going to buy the A8-370K Processor and use it with the F1A75-I DELUXE motherboard by ASUS. My main question is with this setup, can I use the CrossfireX dual mode with any discrete video card? I wanted to use it with the AMD Radeon HD 6850. Would this be possible? Could I use it with an even better video card than that? And how much extra performance would I get from it? Thank you!