pcie not working

Product: HP Compaq 8200 Elite CMT PC Operating System: Microsoft Windows 10 (64-Bit) Motherboard: 611835-001 611796-002 written on board BIOS: J01 v02.33 I upgraded my stock PSU 5 months ago since it doesn’t have a 6+2pin to power a GPU and only a 320w. I replaced it with “EVGA 500w BV 80+...