Hello to everyone. I just bought a new Sapphire Radeon HD 6850 1GB yesterday, and I installed it on my PC, and Windows didn't detect the new card. My old GTS 450 worked fine and dandy, and I completely have no idea why my card isn't detected. I tried a lot of stuff already, changing power cables (same PSU, just different cables), resetting it, flashing to a newer BIOS on the mobo, and nothing worked. It only worked when i removed one of my RAMs, and then Windows detected it and played as normal, even tried far Cry 3 on it for a while. but once I shut down the PC, it happened again, and this time, the mobo only detects it when both one of the RAM and the dvd drive is removed, with the DVD drive only the SATA cable was removed. And after another shutdown, the card is undetected again. Anyone have any ideas? This is the spec of my PC: Intel i3-2100 Gigabyte H61M-D2-B3 (The LAN port was damaged, if that helps any. but the LAN's light is still running, but the orange light is not blinking and the green one is not present.) 8GB DDR3 RAM (one of them a Mushkin RAM, the other Kingston, the first successful usage was when I remove the Mushkin RAM) 1x Seagate 1T HDD 1x Samsung 1T HDD 1x Seagate 2T HDD (None of the HDDs are removed in any successful run) CM Real Power Pro 750W PSU 1x DVD drive Now I am running this on onboard graphics, and I missed my Far Cry 3 already... Any ideas? I have removed completely using Driver Sweeper for the Intel HD onboard gfx, the successful AMD installation and also the GTS 450's driver. Any ideas? Very urgent here... Oh, and if it's any related, my old GPU, the GTS 450 was toasted just two days ago, one day before I bought the 6850.