So i had this system for over a year now and was running decently up until a few days ago. Then i had to replace a cpu fan. Since i my cpu had been running hot for a while i decided to get a new performance cpu heat sink. I picked up a coolmaster hyper n520. So i reattached the mobo, the 4870x2 gfx card, and put my memory back in. When i booted up the card instantly had 3 led's for the no 6 or 8 pin connection and and the thermal issue led was on. So i took it out, put in two pnp nvida PCIe x16(one in at separate times, test one didn't work, test the other didn't work). It is rather strange that this would crop up now. Maybe i am drawing too much power with the new fan?