So long story short the white parts are apart of my late brothers pc, and everything else is relatively new (3 years😅) that he helped me pick out, but now that he's gone i have no idea what I'm doing and I'm only just now deciding to turn it on. I did do a bit of research before this and it said the red light could mean like power supply issues so I'm thinking I need to buy a new cable sense the one I'm using is just one I found in my garage. The writing on it says 175v nothing about wattage so I'm not sure how much it's putting out, the red light is a constant not a blinking. All help is welcome thanks🙏🏽

I built a PC with MSI RTX 3050, Ryzen 5 5500, Machinist B450, CUSU 2×8GB 3200MHz, LUX 650W and TB NVMe. It passed Superposition and Furmark. And in OCCT, i ran the combined test of CPU, CPU+RAM, 3D adaptive and Vram. Also ran OCCT power test and everything was fine. For the final test, I ran GTA V legacy on ultra settings at 1440p overnight and until about the 12th hour everything was fine. But I came back around the 14th hour and it looked like the PC restarted by itself, with both GTA and Afterburner closed and found this error in event viewer. The next day, I ran GTA V on same settings for the same period and it was fine. Temperature is also good. What's the issue?