I recently bought a Phenom II X4 940, I installed it, it worked great, I started up BF3 and not 2 minutes into the game my PSU blew. I did OC it a bit, would that have caused it to blow? I bought a new PSU and everything is working again. However, I'm afraid to play BF3 incase it blows again. Its a 700w 'Ambiance 80+'. I explained the situation to the guy in the shop and he recommended it to me.
Did the OC cause the PSU to blow?
It had the stock HSF, it was a 880w PSU. I have a 6950 and 4GB RAM, which were running perfectly before upgrading the CPU. What could have caused the blow?
First the fuse blew(5A), so I used my monitors kettle lead (fused at 10A), so I think that caused the PSU blow, but what would have caused the orginal fuse blow?
This is how I would look at it.
Were you close to drawing 700W of power? You can check your components here http://extreme.outervision.com/psucalculatorlite.jsp
How much extra voltage were you trying to trying to draw? Could it have been close to the rail maximums?
I honestly believe that if you only OC'd "a little bit" no answers to those questions would be yes. Most likely is that when all your components starting pulling power at a decent rate for the high requirements of BF3 the so called "weakest link" happened to be in your PSU, and it blew. Most likely just a manufacturer's defect.