Arthur Hartwig schrieb:

I have a Gigabyte 8I945P-G motherboard with a Pentium D 820 CPU. Hyperthreading needs to be enabled in the BIOS for FreeBSD to see the second CPU. It appears the CPU presents itself as a hyperthreaded CPU with two "logical" CPUs - each "logical" CPU actually corresponding to a CPU core.

I think this is done due to licencing restrictions of several operating systems (which have CPU-bound licencing models). Showing a second CPU on a dual-core die as a hyper-threaded seems to avoid this problem. The question is now: AMD does not have HT, do they also show the second CPU as a logical one (from the point of view of the BIOS)?

Oliver
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