Although im at work right now (ARGH! [content edited] night shift!

i never have a screen saver on, although the only changes i can think of that i've made twords the video at all.. would be changing my monitor from 60 hertz to 70...
but my monitor claims to support 70.. i was informed that could cause it, so i switched it back to 60...
also, the errors happened while i was asleep, so a timeframe of idle time, is something im lacking, and wishing i wasnt...
Power on the other hand could be the issue...
i have a 300 watt Psu, and im running two 120 maxtor hd's, and a 40 maxtor, and a tdk 48x burner, along with an 8500 radeon, SB live, and a network card, a case fan, and a cooler master areo 7 (although bulky and awkward.. it does the job, really well)
since this my first time ever putting so much power through any pc i've ever built / owned... i figure that it might have something to do with it..
any feedback is appriciated and im very grateful for all your help...
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Opty 170 @ 2.5ghz
Asus A8N32 SLI Deluxe
2gig gskill @ DDR456 - 2.5-3-3-6
Saphire ATI Radeon x850xt @ 560/580 -SOLD-... Had to make ends meet.