aka_STEVE_bMy guess - Cyberpower has the drivers all borked up ... from AMD chipset / AGESA / & board BIOS plus probably a dozen other settings in Windows & the Nvidia drivers too.
daveoshinskyI uninstalled the NVidia driver using DDU, and let Windows do an automatic reinstall of 457.71 NVidia driver. I noticed that the download from NVidia directly is a later driver, 461.72, but left the earlier driver 457.71 from Microsoft store. I also removed the tempered glass from the PC for better ventilation. Unigine Heaven 4.0 now seemed to run longer, with the GPU reaching close to 80 deg C I believe, but it eventually crashed again in the same way as earlier. I earlier attached a small photo of the PCI-E connections to the GPU. Without taking the machine apart further, can I tell whether the GPU is wired properly to the PSU, on its own rail, based on the photo? Or do I have to further disassemble the PC to clearly see the PSU, which is hidden inside a metal housing?
daveoshinskyPR1000W isn't exactly the same model number. I'm not sure whether it's identical with ATX-PR1000W. I'm curious how you posted a URL here. The forum SW always removes a URL when I copy & paste it.