Processor Family	Processor Version	External or I/O Voltage (V)	Internal or Core Voltage (V)	Power Management
8088	All	5		None
8086	All	5		None
80286	All	5		None
80386DX	All	5		None
80386SX	All	5		SMM on 80386SL only
80486DX	All	5		SMM in SL-enhanced versions
80486SX	All	5		SMM in SL-enhanced versions
80486DX2	Intel	5		SMM in SL-enhanced versions
	AMD, Cyrix	3.3 (5V tolerant)		SMM
80486DX4	Intel	3.3		SMM
80486DX4	AMD, Cyrix	3.3 (5V tolerant)		SMM
AMD 5x86	--	3.45		SMM
Cyrix 5x86	All	3.45		SMM
Pentium	60, 66	5		SMM
	75 to 200	3.3 (STD) / 3.52 (VRE)
Pentium OverDrive	63, 83, 120/133	5	3.3 (STD) / 3.52 (VRE)	SMM
	125, 150, 166	3.3 (STD) / 3.52 (VRE)
Pentium with MMX	All	3.3	2.8	SMM
Pentium with MMX OverDrive	All	3.3	2.8 (3.3 from motherboard)	SMM
6x86	Regular	3.3		SMM
	6x86L	3.3	2.8
K5	All	3.52		SMM
Pentium Pro	150	3.1		SMM
	166, 180, All 200s	3.3
Pentium II	All	3.3	2.8	SMM
K6	166, 200	3.3	2.9	SMM
	233		3.2
6x86MX	All	3.3	2.9	SMM

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