386 motherboard, 486 motherboard, Pentium (586) motherboard, Pentium Pro (686) motherboard. CPUs of the same level often have further divisions. For example, Pentium motherboards support multi-function Pentium (P55C, MMX requires dual voltage built in the motherboard), whether to support Cyrix 6x86, AMD 5k86 (both Pentium-class CPUs, The motherboard is required to have better heat dissipation) and so on.

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