I've just upgraded today from an athlon 64/radeon 9800 to core 2 quad/gf8800 gts. A few strange problems however: First off, the system will only boot when the case is on its side. When it's stood up, nothing displays on screen and there's no hard drive activity, just the usual clicking of drives and whatnot. Secondly, not a huge thing but still a bit annoying is when I shut down and turn back on or restart, the system begins to boot, then turns itself off, then on again before booting. I'm also getting quite a lot of crashes (i'm using Vista). I'm not sure if this is related to the case being on its side on a carpeted floor or not, although the CPU isn't getting overly hot. It's all currently stock cooling with one small fan on the case and a 450W power supply. Any thoughts?