16 hours prime95 stable but crashing in games

[SpudMaster]

As title, got my DFI LanParty LT X48-T2R up and running and have been overclocking. Tested my overclock in prime for 16 hours and all was fine, been playing COD4 today and it keeps locking up Put everything back to stock speeds and it still crashes.

Could it be my psu (enermax noisetaker 600w) is dying? my 24pin plug recently seems to have become a bit iffy (if i knock it my board loses power). Also my psu only has the 4 pin power plug for cpu, do x48 boards need to have the 8 pin to be stable?

My psu is a about 2 - 3 years old so im thinking it maybe getting a little tired.

Or am i barking up the wrong tree entirely and something else is causing the problem?

Thanks

 

[SpudMaster]

Sorry forgot to say, i ran blend test in prime.

Just been playing UT3 for a couple of hours, no crashing in that game. So thought to reinstall COD4, played for about 4 mins and crash.

Gonna install more games n see if its just COD4 thats causing the problems. Then will try different psu and graphics card