Look at this post
http://www.xtremesystems.org/forums/...postcount=1678
OCCT is being rewritten. It is mistaken about, because of that "30mn PC Stable" message. New releases will put the minimal test at 1h. And never forget, to be 100%, you'll need a few hours run like any other proggy.
In RAM mode, OCCT is much more sensible than Prime95 Blend
If only OCCT fails, just run it at stock. If it doesn't fail, you know the answer: The PC is tsable until you find a game/program that stresses the RAM/NB subsystem and you'll hang up. Also, if you have an unstable PC, each time you have bugs, you'll have to test without OC to rule out an unstability. So, it's better to run a rock stable config, rather than a so so stable