Randomly getting BSOD

Hi arso :) .

In conjunction to what koolkat77, suggested I recommend you physically remove one of the modules
(memory sticks) from the system and try it out in that configuration, if you're still having issues
try the other one.

On a different note,
I recommend installing the x86 (32bit) version of Windows with that hardware.
Also keep in mind that you motherboard's OEM is nothing special when it comes to
long-term support of Windows 7.