Intel Pentium II identification

Pentium Pro boxed processors | Pentium II (SECC package) | Pentium II markings (SECC2 package) | Mobile Pentium II and Celeron processors | Celeron boxed processors | Celeron PPGA CPU markings | 80486 | Pentium | Pentium III | Modern Intel CPUs | Other Intel chips

To identify Pentium Pro, Pentium II and Celeron OEM part numbers please see the page Identification of modern Intel microprocessors.

1	2	3		4
BP	80521	200		256K
					4. Size of L2 cache
					256K	256 KB
					512K	512 KB
					1M	1 MB
					3. Frequency
					133	133 MHz
					150	150 MHz
					166	166 MHz
					180	180 MHz
					200	200 MHz
					2. Processor core
					80521	Pentium Pro
					1. Package type
					BP	Modified staggered ceramic PGA

1	2	3	4	5
B	80523	333	512	E
					5. ECC support
					Blank	No ECC support
					E	ECC is supported
					4. Size of L2 cache (KB)
					256	256 KB
					512	512 KB
					3. Frequency
					200	200 MHz
					233	233 MHz
					266	266 MHz
					300	300 MHz
					350	350 MHz
					400	400 MHz
					450	450 MHz
					2. Processor core
					80522	Klamath core (0.35 micron)
					80523	Deschutes core (0.25 micron)
					1. OEM/Retail version
					B	Boxed version

1		2		3		4		5
400	/	512	/	100	/	2.0V		S1
									5. Package type
									S1	Slot 1 cartridge
									4. Operating voltage
									2.0V	2.0V
									3. Bus frequency
									100	100 MHz
									2. Size of L2 cache (KB)
									512	512 KB
									1. Frequency
									350	350 MHz
									400	400 MHz
									450	450 MHz

	1	2	3	4	5
PM	D	300	05	001	AA
						5. Processor revision
						ES	Engineering sample
						QS	Qualification sample
						Other letters	Production revision (starts from AA)
						4. Design revision (starts from 001)
						3. Cache size
						01	128 KB
						02	256 KB
						05	512 KB
						2. Frequency
						233	233 MHz
						266	266 MHz
						300	300 MHz
						333	333 MHz
						366	366 MHz
						400	400 MHz
						433	433 MHZ
						466	466 MHz
						1. Module type
						D	Pentium II mobile module (MMC-1)
						E	Pentium II mobile module (MMC-2)
						F	Pentium II with on-die cache mobile module (MMC-1)
						G	Pentium II with on-die cache mobile module (MMC-2)
						H	Celeron mobile module (MMC-1)
						I	Celeron mobile Module (MMC-2)

1	2	3	4	5
BX	80523	R	333	128
					5. Size of L2 cache
					000	The processor doesn't have L2 cache
					128	128 KB
					4. Frequency (MHz) or frequency identifier (if less than 266)
					3. Processor features/Package type?
					F	FC_PGA or FC_PGA2
					P	Plastic PGA package
					R	SEPP package
					2. Processor core
					80523	Covington core (0.25 micron)
					80524	Mendocino core (0.25 micron)
					80526	Coppermine core (0.18 micron)
					1. Packaging
					BX	Boxed processor

1	2	3	4		5
FV	524	RX	333		128
						5. Size of L2 cache
						128	128 KB
						4. Frequency (MHz)
						3. Bus speed
						RX	66 MHz
						P	66 MHz (for boxed Celeron PPGA processors)
						2. Processor core
						524	Mendocino core (Celeron, 0.25 micron)
						1. Packaging
						FV	OEM/Tray processor in staggered plastic PGA package
						B	Boxed processor in staggered plastic PGA package