I bought a Cosair CX750M. Previously used VS650 but it is not supplying enough power when I am playing games (PC tend to restart). So I installed the new PSU last night and it was working fine. I used it for about 6 hours and turn it off without any problem. But in the morning, I was not able to turn on my pc. I changed back to my old PSU and it is currently working, so I think it is the new PSU problem. I am not sure if I installed it wrongly as it was working the whole night. I am wondering if it is my installation fault or just hardware problem that I can exchange?