Ntoskrnl.exe, Ntfs.sys, Etc. - Having BSODs For A Year And A Half

I have been getting BSODs here and there ever since I put this computer together in August 2010. It's become intolerable and I am just so sick of it...I am running full retail Home Premium x64 on this platform:MSI 890GXM-G65 mainboardAMD Phenom II X4 BE 965 Deneb4x OCZ AMD Black Edition RAM 2GB (clocked at 1066 with 7-7-7-21 timings (factory default)) 8GB totalXFX 650W PSU*XFX 5850 GPU (HD-585X-ZNFC, 725mhz/1GB DDR5)1TB WDC HDD*Graphics card recently crapped out, system would no longer POST with it hooked in. Running on an ancient PNY NVIDIA 7600GT back-up...The Windows installation is approximately 7 months old, I have tried reinstalling three times to remedy the situation to no avail. I gave up on re-installation as a cure.The most common cause seems to be simply being IDLE. As in, I'm not even at the chair interacting with the computer.

Firefox (up-to-date) crashes ALL THE TIME - usually having to do with Flash Player corruption. Reinstalled Flash, reinstalled FF. No difference. IE9 is a bit more stable but also crashes (albeit not fully, so I use it more often than FF).I don't have dump files that reference it but atikmpag.sys was often the "culprit" of many of my BSODs prior to the card crapping the bed. In fact it even caused a crash after the card was replaced with the old 7600GT, at which point I uninstalled everything ATI. There hasn't been a BSOD pointing to it since.

I get all kinds of Flash corruption, pixelation, and lag when a BSOD is imminent - some of the time. 3D gaming however, is typically stable. Skyrim for instance, ran well until the GPU misfortune.I have tried lots of RAM manipulation (Timings, Voltage, whatever) and it just makes things worse when I stray away from the factory defaults. I believe there is a limitation with my series of CPU in using 4 DIMMS - the memory controller can't handle speed above 800mhz or 1066mhz or something. I forget exactly what. But I am using 4 modules, so I have gone by what I read and this fixed ATI driver hang-ups (hang -> black screen -> "ATI driver stopped responding and has recovered) I was having in a different game a while back (Vindictus).

Windows Memory Diagnostic has never returned a problem with the RAM. Memtest didn't either the last time I tried. Admittedly this was a while ago, but like my title states, I have been having these problems since basically day one of this build.pologies if I have omitted anything that could be of use. I have put this off for a long time and am quite frustrated. I have read about 50 threads with similar BSOD error codes and still haven't gotten anything useful so maybe my problem needs a specific