Heres my story:
I have very strange problem, took me 2 months to "find and fix it". After updating windows 7 professional sp1 with windows auto update i started to have random bsods/freezes. After bsods started, even if i did a fresh installation of windows 7 without updating it the bsods would continue pointing to memory problems.
I tested literally everything and under many various settings - finding that if i put in 1 stick of ram or 2 sticks in same channel bsods/freezes would stop. Anyway OCCT PSU test would laugh at me with its 'error detected sound' after around 10 mins of running. If i would put ram sticks into channel A1&B1 or A2&B2 or even A1&B2 or A2&B1 - sytem would freeze during occt PSU test after few seconds to 5 mins.
Thought its my PSU dying even if it had solid rock perfect atx stable voltages (changed capacitors myself cause warranty went off) that i have tested with multimeter.
So i bought new one - an XFX Core 550W, and yeah the freezes/bsods would continue.
Bought another pair of Kingston Hyperx Grey 2x4GB 1600 cl9 and same result. Then i put in 4x4GB and i had problems even with bios freezing/not always booting.
Then i thought its motherboard or cpu memory controler fault. Asked friend for his motherboard (asus m4a-something, older but better than mine because of 8+2 cpu power section) reseated everything and bsods/freezes would stop with 1 memory stick or 2 or 4.
So looked like it was my motherboard fault, but then i wanted to simply check last thing possible - flash bios to older version (2401 to 2202) and guess what? it helped - no bsods/freezes or any errors (bye bye occt duck laugh) during system tasks, gaming or long 1h OCCT PSU test.
Thought it was faulty bios then, but no - i flashed again to 2401 under bios and no bsods/freezes. Looked like a bad bios flash since about year ago i flashed from some older bios to newest 2401 using asus update under windows.
Used my PC stable as hell for 1 month. Until yesterday when i decided to make another windows update (last one i did was right before xmas then i flashed bios and "fixed" my pc)
But now without fear after 1st BSOD i went again to OCCT PSU testing - 2 mins and freeze. Reflashed bios to same version under bios. And bsods/freezes stopped.
My question is - why does windows update force me to reflash bios to get rid of bsods/freezes? I guess it shouldnt touch bios, neither its settings or idk what. Anyway windows 7 is updated and running stable.
Writing this post because i seen ppl with similiar problems but without any stable fixes.
Before You answer me remember that i tested everything (memtest without windows for 24hrs or other tests from UBCD. Disk, GPU, i even changed sata cable..)
Anyway feel free to post your ideas.