For some reason, my second graphics card has stopped showing up in the device manager. When I first got my PC it was there, but it seems that after I updated my drivers, it stopped showing up. The fan on it is still spinning, so I think it still works. I have dual Radeon HD 6870's, linked with crossfire. Also, it seems like my liquid cooling system is no longer working, I've had some problems with overheating. I also think that the reservoir is upside down, since I haven't seen it installed in any other system like it is in mine, (I ordered it from Cyberpower PC). It's an Asetek 510 LC system, on a loop. The computer's only a few months old.