Hi, i had the same problem i though it was my ram still think it was, so i ran my Mem DIagnostics cd, downoadble as a ISO to put onto a cd/dvd to boot from, more on this later..
I formatted my pc after other problems i was getting, not so much BSOD but slow, spammed and completely utterly knackerd.
I think that your problem could
a) Faulty ram module (remove them then place 1 in slot 1, then try other in slot 1, check motherboard manuals for proper ram placement, sometimes it might be 1, 3, 2, 4. read your manual to find out!)
Bad Driver, when does it happen? shut down? could be a graphics problem, opening a webcam / scanner / printer could be your drivers for them.. or even motherboard drivers, graphics card drivers maybe the wrong one but still works with higher risk of BSOD, try it all.
c) when does it happen? safe mode? during games? during browsing? could it be a recently installed Modem / Router?
Check, www.computerhope.com for more info.
The name of the memtest was Memtest64 (i think!) its a site where you download, place onto a disk, then boot from that, it is a scary screen since it is blue but let it do its magic and try moving ram around, or just try one ram stick at a time in each of the ports, can take a while!
Good luck Janolapin,