Hello,
There's something strange going on with kernel 3.6.x:
https://bugzilla.redhat.com/show_bug.cgi?id=859188
My RAM is heavily tested - some time ago I ran memtest86 for 2 hours straight and
it showed no errors, besides neither my RAM, nor my CPU are overclocked.
All three people who experience this problem have Linux 3.6.x installed and this bug
didn't affect them when they ran Linux 3.5.x.
Best wishes,
Artem