After feels like weeks-long tests and consultations with RolloZ170 over PM about getting at least some POST Codes other than "ff" even if Sapphire Rapids QYFQ CPU is ES/QS but still compatible with LGA4677 Socket standard (but might not be supported by BIOS due to lack of stepping microcode) - have decided to hit "initiate return" on e-bay since all evidence is pointing to 99% defective CPU likelihood (motherboard is brand-new from Supermicro in nicely handled package by DHL with all other systems {BMC} functioning properly including front panel leds, Fan subsystem, etc.).
If I could get anything else than always "ff" even after hitting "power on" button and always getting only 25 seconds CPU fan rotation cycle before system getting back to "off" state (with operational BMC - that's how I was connecting to it after all) - that would be at least some progress but may be next time..
If I could get anything else than always "ff" even after hitting "power on" button and always getting only 25 seconds CPU fan rotation cycle before system getting back to "off" state (with operational BMC - that's how I was connecting to it after all) - that would be at least some progress but may be next time..
