Some people will just work to do something. It’s pretty boring doing nothing every day. Especially customer facing roles where you can talk to people instead of staying home. For cooks they can hone their skills everyday.

5080 is same price as the 4080 super, probably because the 4080 wasn’t selling.

PFC is in the power supply. The bios doesn’t control it. Only servers may have this control.

Try running some equipment that needs extra load from the UPS. TV? Gaming system? Again could just be an issue with the UPS.

Some systems just need a pure sine wave UPS. Especially high grade server hardware. But test the UPS with other computers, it could just be faulty.