I have 2 6 pin PCIe plugs connected to my gfx card. I totally uninstalled 8800gt using driver sweeper. When i reinstall the 8800gt, however, it will post normally with the OC settings, earlier I pulled the 8800 back out after getting it to post, then reinstalled the 4870. This time it posted and seemed to run fine until I had the realtek hd audio error in Bad Company 2 had to reboot. Upon rebooting it couldn't post and reset bios.