Good morning all. I’m hoping some of you may be able to give me some insight on an issue I’m having. I built a budget gaming rig approx 3years ago now for my son. It’s an i7-3770 with 16gb ddr3 and a GTX 680oc. Also have 2 120GB SSD’s in raid and a 1TB 3.5” HDD. Approx 18 months ago the PSU failed and I purchased a lower priced,(lower quality), 750w PSU. Around 2 weeks ago it gave up on me, (intermittently it just wouldn’t turn on, eventually it wouldn’t turn in at all and it failed the paper clip test). So I found locally somebody selling a corsair CX600, bought it, fitted it and everything was working great. Until yesterday. Son goes to turn on his pc, nothing. Tried shorting them power supply pins on the motherboard, tried disconnecting everything but the cpu & ram. Still dead. Tried the paper clip test again with the HDD plugged in and it still won’t power on. Obviously I’ve also ruled out the lead and the plug socket. It appears that this PSU has also now died, but my question really is a) could a component such as the gpu be the cause of repeated failures? And b) best way to diagnose what could be happening here. Might be worth noting that according to corsairs online PSU calculator the system requires 400w, so I went with higher rated supplies for the headroom. Thanks in advance guys.