Thats weird ... I just put a PIII 1 ghz FCPGA (100 fsb version) in a spare PC, using a PC Chips 726MRT board. I previously had a Celeron 566@850 in it.
But due to the dated BIOS and its missing microcode for either chip, both are misreported at bootup.
The 566@850 shows up as: 800E
The PIII 1ghz shows up as: 800EB
Sandra obviously correctly reports both chips for what they are, an 850 and a 1,000 from within Windows, but at bootup that EB after the PIII threw me for a loop.