Hi,

I think the best thing to do to rule out voltage and your OC as a problem is to take it back to stock settings and check temps again for a while ( both Idle and Load).

If your temps are still too high at stock clocks and voltage, then it shows its a HSF issue, either the HSF contact (TIM/Mounting) or Fan issues (inadequate rpm etc)

If the temps are fine at stock then it shows that the OC and Voltage is the issue, and you need to re-think your 24/7 OC settings a bit....

Best thing to do is to just gradually increase the clock speed at stock settings, until you can't boot, keeping an eye on temps of course at each increment. Then once you reach max Clocks at stock voltage, and provided temps are still within your comfort zone, increase the Voltage gradually until the OC is stable, again keeping temps within your preferred range.

The max temps for the Phenom 9950, as per AMD, are 61C for 125W 9950 and 63C for 140W 9950, so ideally you want to keep your Load temp below this figure, the lower the better of course... though its to be expected that AMD will have erred on the side of caution when detaling the max temp as well.

My own preference is to aim for a load temp of about 10C lower than the max temp of 61C/63C so a load temp of approx 51C-53C for 24/7 OC.

With a benhcmarking profile with a higher OC and voltage for short periods only (if possible) at the moment my max OC Load temps are below the 51C-53C range anyway, so I just run at this 24/7 (allbeit with C'n'Q enabled so its only rarely using max voltage anyway - i.e. under Load)