I'll put this in general hardware as I'm not entirely sure exactly where the problem is. But this is the problem. I just got my parts for the new computer today. Finally everything is up and running (had a really annoying snag befor I got AHCI and NCQ working on the hdd). Except one thing. I can't use the graphics card! If I run 3DMark 05 it gives the error D3DERR_DEVICELOST when I try to run a benchmark. 3DMark 2001SE won't work. Nothing else either it seems. I've tried reinstalling DirectX (which I can't since it's the latest version allready) and the video drivers, but no difference. Specs: P4 3.2 on an Asus P5GD1 mobo MSI Geforce 6600GT 1 Gig Kingston DDR3200 Forton/Source 400W PSU (with dual 12V rails) Windows XP SP2 Tried both MSI supplied and nVidia reference graphics driver Dxdiag tests work ok (one said I had aborted though, but I hadn't) No overclocking Enough cooling to go around Has anyone seen this? Trying Google turned up pretty much nothing. I really have to fix this. No fun if I can't run any games.