I have built a PC with an AMD Phenom II 550 BE unlocked all 4 cores and overclocked to 3.55GHz temp never goes over 50C (doesn't reach mid 40s except in Prime95). I can run Prime95 (and any other software) for hours and never have a problem but if I run the processor arithmetic benchmark in Sandra it hangs straight away. Is this an instability problem or what, should I be worried. Any ideas anyone?
Mother board is an Asrock 880G Extreme 3
2 x 2Gb OCZ RAM
Hyper TX3 cooler