Originally Posted by PP Mguire
Ok I should have posted before =/.
Anyways, HWMon will only show accurate readings of your PSU voltage IF the board has good sensors in the right places. 90% of the time this isn't the case. If your PSU is faulty then the problem will be non-CPU vdroop or a voltage drop under load. This can be random if something internally in the PSU is going bad so it could very well be load causing the shut down. As was said several times something of this nature can only be caused by a few things. The #1 thing is usually heat related, and that 80c load temp could do it. The next thing would be PSU sending some negative juju to the PC and a shortage protect is tripping.
The easiest way to see if your voltages are getting too low is to load both the CPU and GPU at the same time using Prime95 and MSI Kombustor respectively. Then measure your 12v. You can sometimes use HWMon for this because if it's real bad it'll be low. Doing the above puts a real load on your PSU to effectively see if voltages are dropping dangerously low which is a norm for CM PSUs.
Thank for replying!
The minimum voltage I got with CPU and GPU at 100% from the 12V rail was 11.821V. It was a 10 minute test, the temperatures were flaming hot but I don't think it would have made such a difference if I left it on for more.
Also, the air outlet was cool and this could indicate that the air inside isn't circulating and that it's avoiding the hot hardware.
This baby will never quit unless you wait until it turns off by itself. The shortage protection tripping sounds plausible but there is also something unusual about the shut down that I haven't mentioned. When the PC turns off, it then automatically turns on by itself. Usually during POST or after a few seconds of boot the PC turns off again and repeats the process. When this happens I pull the plug so it doesn't turn on again.
After 30 minutes without power the PC can be turned on and used normally again.