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