random system freeze, need help

[Manaknight]

heya

ok so i built myself a brand new system in late november/early december. this came from that fact that i was tired of my finicky dfi 939 board, but also it was because i was experiencing a hard freeze in windows xp. at that time i tried everything and of course after the parts were already ordered a reinstall of windows fixed the issue...

fast forward to last week. I began getting the same kind of lockups again. its those locks where everything totally freezes, no blue screen or anything. i am leaning towards hardware related because its happened on both my xp and vista drives.

here is where it gets hazy though... i have taken a good bit of steps to try and solve this already... here is where i am at

1. memtest for 8 hours and no errors (i know the 680i boards are notorious for eating ram)
2. orthos for 8 hours, both cores are stable
3. temps are cool video card is high 40s, cpu is mid 30s idle does not break 50 under load.

this issue is very sporadic, it happens maybe once or twice a day and usually in the afternoon, last night i played shadowrun for 6 hours then did some 3dsmax work and not even a hiccup.

any suggestions, i am going to try a spare power supply that I have though i would be sad if my corsair 620 is dying.

my system specs are as follows
core2duo e6750 @ 3.36 (also tried on stock)
evga 680i A1
bfg 8800gt oc 512
4x1gig of ballistix tracers
2x sata dvd drives
2x 500gb sata drives and 1 320 sata drive, all seagate
corsair 620hx modular

any feedback would be great, not really sure what the issue is as windows leaves no discernable errors, it happens very sporadically and i'm pretty sure it only has happened while the system is idle, and none of the usual suspects seem to be at fault

 

[Psycho_Soldier]

Try a bios update. I have had issues before where nothing appears to ever be wrong then something wierd like this for example happens and I go through every test I can think of and as a last resort I do bios update and it fixes everything.

Now is your Vista OS running off the same HD as the XP OS? It is possible that the hard drive is going bad and it could be losing power. I had this issue before as well and then it eventually just wouldnt power up so I had to replace the PCB board with the exact same model of the hard drive in order to get it to work.

 

[Manaknight]

i will try the p32 tonight

hard drives are seperate, the 320 runs vista and the 500 runs xp, with a 500 for storage of my animation work

 

[Manaknight]

went up to the new firmware, another 9 hours orthos stable, so far so good...