i have 3 intel SR1560SFHS Servers with 2 E5420 processors each.
all have the same problem:
the bios errors accure:
8180 Bios does not support current stepping for Processor P1
8160 Processor 01: unable to apply BIOS update
8161 Processor 02: unable to apply BIOS update
a bios update to the newes version and even to the older versions was done via the intel development assintent over the internet.
but without any result!