Got myself an Intel S5520UR server to play with.

1st observation: if the dozen firmwares running on CPU (EFI/„BIOS“), Management engine, baseboard management controller… and FRUSDR config (Field Replacement Unit Sensor Data Record) are not in sync, all fans will spin at deafening 100% and idle power is >300W → reflash all the things and it’s pretty quiet and consumes „only“ 150W

2nd observation: running Linux efibootmgr instantly hard locks the machine → add EFI boot records in the BIOS setup

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