Just purchased a brand new Corsair 750W power supply along with a Sapphire RX Vega 56 Pulse graphics card, and also had to get a replacement for the graphics card because I thought it was causing the problems. PC has been restarting within 1-15 seconds of benchmarking or playing a game. Before I replaced the power supply, my computer wouldn't restart, instead it would power off the entire system. Been trying to troubleshoot this for days and can't find a solution. Any help would be much appreciated. Thanks!