Which motherboard to use for Multi-processor? Are there any motherboards able to support more than 2 processors?

not all
bu some motherboards for server

QUOTE Are there any motherboards able to support more than 2 processors?
There are no Socket A/Athlon MP motherboards for more than two processors, sorry
If you want/need more than two CPUs, you might want to consider an Opteron-system

Basically, any dual-Socket A motherboard should be just fine...a lot of people seem to like either Tyan or Iwill, but i can't really give a recommendation myself as i don't have any first-hand experience here

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