Rapid, frequent crashes...

Okay... so as of late (The last two patches or so) I've been crashing like a madman.... if madmen crashed. I've reinstalled SL, cleared cache, even completely reformatted my computer, and only installed the drivers and SL, and still the same. My system specs are Windows XP Home Edition, tried both SP 1 and 2, Athlon 64 3800+, ATI Radeon 9800 PR 256 bit, 1gig of ram, VIA AV8 939 MB. My drivers are up to date (From what I can gather), the latest Hyperon drivers for my motherboard, latest Omega drivers for the radeon. I've tried SL with things like shine, shadow, farclip turned on and off, all the same reaction; random crashes anywhere from 30 seconds from login, to an hour from. I've gone to different sims, same issue. If anyone needs any more info on what I'm running to try and figure this one out, just ask. Wish SL told you what the error was when it crashed, instead of just saying it crashed.... anywho, hope someone's able to help.

Bump... no one has any suggestions? I've had Fastwrite on and off, same results, went into the test version of SL, crashed there too.... it may be heat related as something similar to this happened before, I'll test that out soon, but still wondering if this is happening to anyone else...