Been having seemingly random BSODs

My month old desktop has been either freezing/locking up forcing me to do a hard reboot, or just restarting completely on its own since I got it. Only getting the BSODs since I changed the system to not restart automatically. Before that it was just a poof with no explanation. I say random because sometimes it can go several hours or even a day without any restarts. It seems to be happening once or twice a day on average though. Strangely enough it happens most of the time when the computer is completely idle.

windows 7 home premium
intel i7 870
radeon hd 5770
don't know what else is relevant

hoping it's just a driver issue, but I sure don't know

attaching is the minidump from recent crashes. it wasn't set up to save them before these. appreciate any help i can get. this is getting really annoying.

Here is the rest of my info that should be needed, sorry I didn't include it in the first post. Still getting a couple crashes every day, though it's usually not blue screen messages. Usually just the random reboot I mentioned in the first post, with the prompt giving a choice to boot in safe mode. Still having the issue with mouse/keyboard not responding sometimes as well, forcing a reboot. Help with anything would be great.

going through my event log, even though I don't really know what I'm doing, I think i have an idea of what the problem is? I think I'm just losing power to USB at random. I think that's a more accurate description of what happens to the mouse/keyboard. I guess they aren't just freezing up, but losing power completely (laser mouse has no red light coming out the bottom anymore). If the wrong thing lost power (what is connected through USB besides my own devices?) would that cause a crash/reboot? Still need help with solutions if this is indeed what the problem is.

Hate to bump my own topic but no one is going to see it, much less help me if its on page 10+
Power failures, if that's the problem; what could the culprits be?