Random Bsod's

hi, i recently rebuilt my computer, with a gigabyte k8nsc-939 and a athlon 64 3000+, after many hours of trying to get xp to install, i finnaly replaced the power supply(450watt now), and it installed, anyway, the 2nd day, it would crash randomly, twice when i would be doing something, but most of the time when i would let it idle, say, 20 minutes or so after it puts the monitor into standby, so i updated the nforce drivers and it seemed to fix it, now today it just bsod'ed again while i was reading, its always eather irql_not_less_or_equal, or driver_irql_not_less_or_equal, tho twice i told windows to send the crash report, and it said it was a totaly differnt stop error message, and was from the video card, so i dont know what to think.

ive seen you guys help alot of people by minidumps, so ive attached 8 of them.

thanks in advance.

ugh, its like it does it every other day, it didnt do it at all yesterday, but twice allready today.