I HAVE A SAMSUNG HDD , windows 7 ultimate , 16 GB ram , Intel i5 quad core processor, and my motherboard is the ASUS P7P55D Delux . I have been running a GTX 260. I have a friend that will send me a GTX 460 , or a Radeon HD 7850. I had ordered a Radeon 6000 series , and it didnt work . I thought tht it was cuz it was refurbished , sent it back to 3B Tech, but on telephone they say it was a working card . Will my card run a Radeon?, box says crossfire and SLI technology. Link to board is http://www.overclockersclub.com/reviews/asus_p7p55d_deluxe/3.htm .... i REALLY CANT AFFORD TO BUY ONE ON FIXED INCOME , SO IF MY BOARD WONT RUN THE RADEON i WILL ASK FOR THE gtx 460 ...Thanks>: )