weird booting problem

my pc does a weird thing

i have the rig in my sig, and i have been able to run prime stable for a whole weekend.

BUT whenever i close my computer for a few hours, say for the night, the next boot will blue screen me just after i get to my desktop and then the 2nd boot will be allright

its getting annoying because it already corrupted one of my windows installation and i had to reformat and i fear it could happen again.

I see you have different sizes and makers of memory, I would recommend running mem86, might me memory related http://www.memtest86.com/

PSU may not like cold boots, and needs to warm up.

will run memtest when i can spare a few hours...

and yes i was leaning toward some PSU problem because when i tried to add a 80mm fan i got the beep code about PSU problem (AWARD: continous short beep) so i disconnected it... so my guess would be my PSU really runs borderline. Is there a way to warm up the psu? like going into bios for a few minutes before starting windows ?

if it corrupted your OS, i'd think it sounds like you don't have your agp/pci locked. lock it down at 66/33 in the bios if not.

it is already locked