So after turning my PC on this morning. Working on it for approximately 30 minutes the machine suddenly switches itself off. Here's the spec. Core i7 8700k (OC) 16GB Ram 650w PSU Zotax 1060 6GB AMP! Asus Z390-F Initially as soon as the computer was switched on there was a click and everything turns off. Disconnecting the motherboard and using a jumper to turn the PSU on, the same symptoms. Disconnecting the GFX card from the PSU and all the lights come back on. After replacing the GFX Card with an old GTX750Ti (no additional power requirements) the machine boots up, however I am left with a conundrum. Would you say a part of the PSU popped supplying the GPU or the GPU is dead? I have another machine I should be able to test it in later (once I have a hdd) to find out for sure.