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Pentium Processor Reference Table Index
Vcc type	STD	3.135V ~ 3.6V
	VRE	3.4V ~ 3.6V
	VRM	Voltage Regulator Module / Header 7 Socket
CPU timing	STD	Standard timing
	MD	Min Delay
	Kit	Supports timing for C55/C88 cache chipsets & design
DP	Dual Processor support after B4 stepping
Socket	5	320 Pins
	7	321 Pins

--Type--	Family	Model	Stepping	Mfg. Stepping	Core/bus MHz	S-Spec	Comments	Notes
0	5	2	1	B1	90/60	SX879	STD
0	5	2	1	B1	90/60	SX885	MD
0	5	2	1	B1	90/60	SX909	VR
2	5	2	1	B1	90/60	SX874	DP, STD
0	5	2	1	B1	100/66	SX886	MD
0	5	2	1	B1	100/66	SX910	VR, MD
0	5	2	2	B3	75/50	SX951	TCP Mobile
0	5	2	2	B3	90/60	SX923	STD
0	5	2	2	B3	90/60	SX922	VR
0	5	2	2	B3	90/60	SX921	MD
2	5	2	2	B3	90/60	SX942	DP, STD
2	5	2	2	B3	90/60	SX943	DP, VR
2	5	2	2	B3	90/60	SX944	DP, MD
0	5	2	2	B3	90/60	SZ951	STD	5

Type	Family	Model	Stepping	Mfg. Stepping	Core/bus MHz	S-Spec	Comments	Notes
0	5	2	2	B3	100/66	SX960	VRE/ MD
0	5	2	4	B5	75/50	SX975	TCP Mobile
0 or 2	5	2	4	B5	75/50	SX961	STD
0 or 2	5	2	4	B5	75/50	SZ977	STD	5
0 or 2	5	2	4	B5	90/60	SX957	STD
0 or 2	5	2	4	B5	90/60	SX958	VR
0 or 2	5	2	4	B5	90/60	SX959	MD
0 or 2	5	2	4	B5	90/60	SZ978	STD	5
0 or 2	5	2	4	B5	100/66	SX962	VRE/MD
0	5	2	5	C2	75/50	SK079	TCP Mobile
0 or 2	5	2	5	C2	75/50	SX969	STD
0 or 2	5	2	5	C2	75/50	SX998	MD

Type	Family	Model	Stepping	Mfg. Stepping	Core/Bus MHz	S-Spec	Comments	Notes
0 or 2	5	2	5	C2	75/50	SZ994	STD	5
0 or 2	5	2	5	C2	75/50	SU070	STD	6
0 or 2	5	2	5	C2	90/60	SX968	STD
0 or 2	5	2	5	C2	90/60	SZ995	STD	5
0 or 2	5	2	5	C2	90/60	SU031	STD	6
0 or 2	5	2	5	C2	100/50 or 66	SX970	VRE/MD
0 or 2	5	2	5	C2	100/50 or 66	SX963	STD
0 or 2	5	2	5	C2	100/50 or 66	SZ996	STD	5
0 or 2	5	2	5	C2	100/50 or 66	SU032	STD	6
0	5	2	5	C2	120/60	SK086	VRE/MD
0	5	2	5	C2	120/60	SX994	VRE/MD
0	5	2	5	C2	120/60	SU033	VRE/MD	6
0	5	2	5	C2	133/66	SK098	MD

Type	Family	Model	Stepping	Mfg. Stepping	Core/Bus MHz	S-Spec	Comments	Notes
0	5	2	5	mA1	75/50	SK089	VRT, TCP	2,4
0	5	2	5	mA1	75/50	SK091	VRT, SPGA	2,4
0	5	2	5	mA1	90/60	SK090	VRT,TCP	2,4
0	5	2	5	mA1	90/60	SK092	VRT,SPGA	2,4
0 or 2	5	2	B	cB1	120/60	SK110	STD/no Kit	3,4
0 or 2	5	2	B	cB1	133/66	SK106	STD/no Kit	3,4
0 or 2	5	2	B	cB1	133/66	SK106J	STD/no Kit	3,4,7
0 or 2	5	2	B	cB1	133/66	SK107	STD	4
0 or 2	5	2	B	cB1	133/66	SU038	STD/no Kit	3,4,6
0	5	2	B	mcB1	100/66	SY029	VRT, TCP	2,4
0	5	2	B	mcB1	120/60	SK113	VRT, TCP	2,4
0	5	2	B	mcB1	120/60	SK118	VRT, TCP	2,4,7
0	5	2	B	mcB1	120/60	SX999	3.3V, SPGA	4
0 or 2	5	2	C	cC0	133/66	SY022	STD/No Kit	3
0 or 2	5	2	C	cC0	133/66	SY023	STD
0 or 2	5	2	C	cC0	133/66	SU073	STD/No Kit	3,6
0 or 2	5	2	C	cC0	150/60	SY015	STD
0 or 2	5	2	C	cC0	150/60	SU071	STD	6
0 or 2	5	2	C	cC0	166/66	SY016	VRE/no kit	3
0 or 2	5	2	C	cC0	166/66	SY017	VRE
0 or 2	5	2	C	cC0	166/66	SU072	VRE/no kit	3,6
0	5	2	C	cC0	166/66	SY037	VRE,PPGA	8,9
0 or 2	5	2	C	cC0	200/66	SY044	VRE,PPGA	9
0	5	2	C	cC0	200/66	SY045	VRE,PPGA	1,9
0	5	7	0	mA4	75/50	SK119	VRT, TCP	2,4

Type	Family	Model	Stepping	Mfg. Stepping	Core/Bus MHz	S-Spec	Comments	Notes
0	5	7	0	mA4	75/50	SK122	VRT, SPGA	2,4
0	5	7	0	mA4	90/60	SK120	VRT, TCP	2,4
0	5	7	0	mA4	90/60	SK123	VRT, SPGA	2,4
0	5	7	0	mA4	100/66	SK121	VRT, TCP	2,4
0	5	7	0	mA4	100/66	SK124	VRT, SPGA	2,4
0	5	2	C	mcC0	100/66	SY020	TCP,VRT	2
0	5	2	C	mcC0	100/66	SY046	SPGA 3.1V	2
0	5	2	C	mcC0	120/60	SY021	TCP,VRT	2
0	5	2	C	mcC0	120/60	SY027	SPGA 3.1V	2
0	5	2	C	mcC0	120/60	SY030	SPGA 3.3V	2
0	5	2	C	mcC0	133/66	SY019	TCP,VRT	2
0	5	2	C	mcC0	133/66	SY028	SPGA 3.1V	2
0	5	2	6	E0	75/50	SY009	TCP,Mobile
0 or 2	5	2	6	E0	75/50	SY005	STD
0 or 2	5	2	6	E0	75/50	SU097	STD	5
0 or 2	5	2	6	E0	75/50	SU098	STD	6
0 or 2	5	2	6	E0	90/60	SY006	STD
0 or 2	5	2	6	E0	100/66	SY007	STD
0 or 2	5	2	6	E0	100/66	SU110	STD	5
0 or 2	5	2	6	E0	100/66	SU099	STD	6
0 or 2	5	2	6	E0	120/60	SY033	STD
0 or 2	5	2	6	E0	120/60	SU100	STD	6

NOTES:

• STD: The VCC specification for the C2 and subsequent steppings of the Pentium processor is VCC = 3.135V to 3.6V. The voltage range for B-step parts remains at 3.135V–3.465V. Note that all E0-step production parts are standard voltage.
• VR: This is a reduced voltage specification that has the range of 3.300V–3.465V.
• VRE/MD: These parts have a reduced and shifted voltage specification. The VRE voltage range for the C2 and subsequent steppings of the Pentium processor is VCC = 3.40-3.60V. The VRE voltage range for B-step parts remains at 3.45-3.60V.
• MD: Standard voltage specification, but with reduced minimum valid timings.
• DP: indicates that this part can only be used as a dual processor.
• CPU Type of "2" or "0 or 2" indicates this part supports dual processing. The Type corresponds to bits [13:12] of the EDX register after RESET, bits [13:12] of the EAX register after the CPUID instruction is executed. This is shown as 2 different values based on the operation of the device as the primary processor or the dual processor upgrade.
• The Family corresponds to bits [11:8] of the EDX register after RESET, bits [11:8] of the EAX register after the CPUID instruction is executed.
• The Model corresponds to bits [7:4] of the EDX register after RESET, bits [7:4] of the EAX register after the CPUID instruction is executed.
• The Stepping corresponds to bits [3:0] of the EDX register after RESET, bits [3:0] of the EAX register after the CPUID instruction is executed.
• 1. TCASE = 60°C.
• 2. VRT Intel's Voltage Reduction Technology: The VCC for I/O is 3.3V, but the core VCC, accounting for about 90% of power usage, is reduced to 2.9V, to reduce power consumption and heating.
• 3. No Kit means that part meets the specifications but is not tested to support 82498/82493 and 82497/82492 cache timings
• 4. STEPPING The cB1 stepping is logically equivalent to the C2-step, but on a different manufacturing process. The mcB1 step is logically equivalent to the cB1 step (except it does not support DP, APIC or FRC). The mcB1, mA1, mA4 and mcC0-steps also use Intel's VRT (Voltage Reduction Technology, see note 2 above) and are available in the TCP and SPGA package, primarily to support mobile applications. All mobile steppings are distinguished by an additional "m" prefix, for "mobile".
• 5. This is a boxed Pentium processor without the attached fan heatsink.
• 6. This is a boxed Pentium processor with an attached fan heatsink.
• 7. These parts do not support boundary scan. S106J was previously marked (and is the same as) SK106J.
• 8. DP, FRC and APIC features are not supported on these parts.
• 9. These parts are packaged in the Plastic Pin Grid Array (PPGA)

also look at Pentium ®rocessor Top & Bottom Markings

Example

-- From CPU bottom side mark --

SX994/VMU iPP

Pentium processor part mark
Spec	SX???,SY??? SK???,Q0???
Vcc	S=STD V=VRE
Timings	S=STD M=Mini Delay
DP Support	S=STD U=Uniprocessor only
i75	For 75Mhz
iPP	For 75/90/100/120/133Mhz

Pentium Pro Markings

Pentium Pro Processor Reference Table
CPU speed	CPU spec	Vcc type	CPU timing	DP support	Internal clock	External clock	CPU Stepping	CPU Socket	L2 Cache
Pentium Pro 150	SY002	3.1V	STD	Yes	2.5x clk	60Mhz	B0	8	256K
Pentium Pro 200	SY013	3.3V	STD	Yes	3x clk	66Mhz	B0	8	256K

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