In 2017 I build a pretty expensive gaming PC. The PC at the time had a 1080 ti 11 GB, AMD Ryzen 7 1st Gen 1700 with a PSU of EVGA SuperNOVA 750. After using it on and off for about 6 years I thought that Cyber Monday was the perfect time to update my motherboard, cpu and watercooler. After putting everything together the GPU lights would turn on and off until the pc would die and reboot again. Keep in mind the Pc would never boot into the Bios while this was happing. So I unplugged the GPU and then the water cooler RBG and the motherboard RBG turned on for the first time. After this happened It made me think that the PSU is the issue, but 750 W should be enough to power the whole PC. Do you think I should replace the 6 year old PSU or is it something else?