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Intel Modern CPUs (Pentium II - Pentium 4, Celeron, Core, Core 2, Xeon) identification

Modern OEM CPUs identification

¹	²	³	⁴	⁵	⁶
JM	80547P	G	072	1M	M

						6. Extra features
						G		Trusted Execution Technology (Core 2)
						M		Extended Memory 64 Technology (EM64T) (Pentium 4 Prescott)
						N		Extended Memory 64 Technology (EM64T) (Pentium D)???
						H		Virtualization technology
						P		Virtualization technology, reduced power consumption
						T		???
						EC		L2 cache with ECC support (Pentium II)
						PE		L2 cache with ECC support (Pentium II)

						5. L2 or L3 (Xeon MP, Pentium 4 EE) cache size
						This parameter specifies L3 cache size for Xeon MP processors and some Pentium 4 Extreme Edition CPUs. For all other microprocessors this parameter specifies L2 cache size.
						0M		No L2 cache
						128		128 KB
						256		256 KB
						256K		256 KB
						D		Shared 512 KB
						512		512 KB
						512K		512 KB
						1M		1 MB
						15M		1.5 MB
						2M		2 MB
						3M		3 MB
						4M		4 MB
						6M		6 MB
						8M		8 MB
						9M		9 MB
						G0K		256 KB
						G1M		1 MB L3 cache
						003		12 MB
						007		16 MB
						009		18 MB
						015		24 MB
						CN		256 KB, Extended Memory 64 Technology (EM64T) (Celeron D)
						LK		24 MB
						N		12 MB

						4. Frequency (MHz) or frequency identifier
						Numbers above 200 are processor frequencies in MHz.
						Numbers below 200 can be used to identify processor frequency, but there is no easy way to convert them to frequency. For a rough estimate of frequency in GHz use formula "(number + 39) / 40". For instance, for "083" estimated frequency will be (83 + 39) / 40 = 3.05 GHz.

						3. Bus speed
						C		400 MHz (effective), 100 MHz (actual)
						E		533 MHz (effective), 133 MHz (actual)
						F		667 MHz (effective), 166 MHz (actual)
						G		800 MHz (effective), 200 MHz (actual)
						H		1066 MHz (effective), 266 MHz (actual)
						J		1333 MHz (effective), 333 MHz (actual)
						L		1600 MHz (effective), 400 MHz (actual) 100 MHz, low voltage - mobile Celeron and mobile Pentium III
						U		100 MHz, ultra low voltage
						X		66 MHz (100 MHz for Intel Pentium II Xeon)
						Y		100 MHz
						Z		133 MHz

						2. CPU family and Microprocessor core
						80521E		Pentium Pro (0.35 micron)
						80522P		Pentium II (Klamath core, 0.35 micron)
						80523K		Pentium II Xeon (Drake core, 0.25 micron)
						80523P		Pentium II (Deschutes core, 0.25 micron)
						80523T		Mobile Pentium II (Deschutes, 0.25 micron)
						80524K		Mobile Celeron and Mobile Pentium II (Mendocino core, 0.25 micron)
						80524N		Mobile Celeron (Mendocino core, 0.25 micron)
80524R						Celeron (Mendocino core, 0.25 micron)
80524T						Mobile Pentium II (Mendocino core, 0.25 micron)
80525K						Pentium III Xeon (Tanner core, 0.25 micron)
80525P						Pentium III (Katmai core, 0.25 micron)
80526G						Mobile Pentium III (Coppermine core, 0.18 micron)
80526K						Pentium III Xeon (Cascades core, 0.18 micron)
80526L						Low-power Mobile Celeron (Coppermine core, 0.18 micron)
80526N						Mobile Celeron (Coppermine core, 0.18 micron)
80526P						Pentium III (Coppermine core, 0.18 micron)
80526R						Celeron (Coppermine core, 0.18 micron)
80528K						Xeon MP (Foster core, 0.18 micron)
80528P						Desktop Pentium 4 (Willamette core, 0.18 micron, socket 423)
80529R						Timna (0.18 micron)
80530G						Mobile Pentium III-M (Tualatin core, 0.13 micron)
80530K						Pentium III-S (Tualatin core, 0.13 micron)
80530L						Low-power Mobile Pentium III-M (Tualatin core, 0.13 micron)
80530M						Low-power Mobile Celeron (Tualatin core, 0.13 micron)
80530N						Mobile Celeron (Tualatin core, 0.13 micron)
80530P						Pentium III (Tualatin core, 0.13 micron)
80530R						Celeron (Tualatin core, 0.13 micron)
80530V						Ultra low-power Mobile Celeron (Tualatin core, 0.13 micron)
80530W						Mobile Celeron (Tualatin core, 0.13 micron)
80530U						Ultra low-power Mobile Pentium III-M (Tualatin core, 0.13 micron)
80531P						Desktop Pentium 4 (Willamette core, 0.18 micron, socket 478)
80531R						Celeron (Willamette core, 0.18 micron, socket 478)
80532G						Mobile Pentium 4 and Mobile Pentium 4-M (Northwood core, 0.13 micron)
80532H						Mobile Pentium 4 with Hyper-Threading technology (Northwood core, 0.13 micron)
80532K						Xeon and Xeon MP (Prestonia or Gallatin core, 0.13 micron)
80532N						Mobile Celeron (Northwood core, 0.13 micron)
80532P						Desktop Pentium 4 (Northwood core, 0.13 micron)
80532R						Celeron (Northwood core, 0.13 micron)
80533N						Mobile Celeron (Coppermine core, 0.18 micron)
80534P						Desktop Pentium 4 (Northwood core, 0.13 micron)
80534R						Celeron (Northwood core, 0.13 micron)
80535G						Pentium M (Banias core, 0.13 micron)
80535L						Low-power Pentium M (Banias core, 0.13 micron)
80535N						Celeron M (Banias core, 0.13 micron)
80535V						Low-power Celeron M (Banias core, 0.13 micron)
80535U						Ultra low-power Pentium M (Banias core, 0.13 micron)
80536G						Pentium M (Dothan core, 0.09 micron)
80536L						Low-power Pentium M (Dothan core, 0.09 micron)
80536N						Celeron M (Dothan core, 0.09 micron)
80536V						Low-power Celeron M (Dothan core, 0.09 micron)
80536U						Ultra low-power Pentium M (Dothan core, 0.09 micron)
80537G						Core 2 Duo Mobile (Merom core, 0.065 micron)
80537L						Low-power Core 2 Duo Mobile (Merom core, 0.065 micron)
80537N						Celeron M (Merom / Merom-L core, 0.065 micron)
80537U						Ultra low-power Core 2 Duo Mobile (Merom core, 0.065 micron)
80538G						Core Solo (Yonah core, 0.065 micron)
80538N						Celeron M (Yonah core, 0.065 micron)
80538U						Ultra-low power Core Solo (Yonah core, 0.065 micron)
80538V						Ultra-low power Celeron M (Yonah core, 0.065 micron)
80539J						Ultra low-power Xeon (Yonah core, 0.065 micron)
80539K						Low-power Xeon (Yonah core, 0.065 micron)
80539G						Core Duo (Yonah core, 0.065 micron)
80539U						Low-power Core Duo (Yonah core, 0.065 micron)
80541K		Itanium (Merced core, 0.18 micron)
80542K		Itanium 2 (McKinley core, 0.18 micron)
80543K		Itanium 2 (Madison core, 0.13 micron)
80546K		Xeon and Xeon MP (Nocona core, 0.09 micron)
80549K		Itanium 2 (Montecito core, 0.09 micron)
80546H		Mobile Pentium 4 with Hyper-Threading technology (Prescott core, 0.09 micron, micro FC-PGA package)
80546K		Xeon and Xeon MP (0.09 micron)
80546P		Desktop Pentium 4 (Prescott core, 0.09 micron, micro FC-PGA package, socket 478)
80546R		Celeron D (Prescott core, 0.09 micron, micro FC-PGA package, socket 478)
80547P		Desktop Pentium 4 (Prescott core, 0.09 micron, FC-LGA package, socket 775)
80547R		Celeron D (Prescott core, 0.09 micron, FC-LGA package, socket 775)
80550K		Dual-core Xeon (Tulsa core, 0.065 micron)
80551K		Dual-core Xeon (Paxville core, 0.09 micron)
80551P		Pentium D (Smithfield core, 0.09 micron)
80552P		Desktop Pentium 4 (Cedar Mill core, 0.065 micron, socket 775)
80552R		Celeron D (Cedar Mill core, 0.065 micron)
80553P		Pentium D (Presler core, 0.065 micron)
80554V		Low-power embedded Celeron M (Dothan core, 0.09 micron)
80555K		Dual-core Xeon (Dempsey core, 0.065 micron)
80555Q		Mid-power Dual-core Xeon (Dempsey core, 0.065 micron)
80556K		Dual-core Xeon (Woodcrest core, 0.065 micron)
80556J		Low-power Dual-core Xeon (Woodcrest core, 0.065 micron)
80557K		Dual-core Xeon (Conroe core, 0.065 micron)
80557P		Core 2 Duo - if L2 cache is greater than 1 MB (Conroe core, dual-core, 0.065 micron) Pentium Dual-Core - if L2 cache is 1 MB Celeron Dual-Core - if L2 cache is less than 1 MB
80557R		Celeron (Conroe-L core, single core, 0.065 micron)
80560K		Dual-core Xeon MP (Paxville core, 0.09 micron)
80562K		Quad-core Xeon (Kentsfield core, 0.065 micron)
80562Q		Mid-power Quad-core Xeon (Kentsfield core, 0.065 micron)
80562P		Core 2 Quad (Kentsfield core, 0.065 micron)
80562X		Core 2 Extreme (Kentsfield core, 0.065 micron)
80563K		Quad-Core Xeon (Clovertown core, 0.065 micron)
80563Q		Medium-power Quad-core Xeon (Clovertown core, 0.065 micron)
80563J		Low-power Quad-core Xeon (Clovertown core, 0.065 micron)
80564Q		Medium-power Dual-core Xeon MP (Tigerton core, 0.065 micron)
80565J		Low-power Quad-core Xeon MP (Tigerton core, 0.065 micron)
80565K		Quad-core Xeon MP (Tigerton core, 0.065 micron)
80565Q		Medium-power Quad-core Xeon MP (Tigerton core, 0.065 micron)
80569K		Quad-core Xeon (Yorkfield core, 0.045 micron)
80569P		Core 2 Quad (Yorkfield core, quad core, 0.045 micron)
80569X		Core 2 Extreme (Yorkfield core, quad core, 0.045 micron)
80570A		Core 2 Duo (Wolfdale core, dual-core, 0.045 micron)
80570K		Dual-core Xeon (Wolfdale core, 0.045 micron)
80570P		Core 2 Duo (Wolfdale core, dual-core, 0.045 micron)
80573K		Dual-core Xeon (Wolfdale core, 0.045 micron)
80574K		Quad-core Xeon (Harpertown core, 0.045 micron)
80576G		Core 2 Duo Mobile (Penryn core, 0.045 micron)
80577G		Core 2 Duo Mobile (Penryn core, 0.045 micron)
80580A		Core 2 Quad (Yorkfield core, quad core, 0.045 micron)
80580K		Quad-core Xeon (Yorkfield core, 0.045 micron)
80580P		Core 2 Quad (Yorkfield core, quad core, 0.045 micron)

					1. Package type
					Blank		Cartridge. Part numbers marked on OEM CPUs may have package type missing.
					DC		Slot 1 Cartridge. "DC" was used only for early Pentium II CPUs.
					EC		Micro FCBGA package Core 2 Duo Mobile has 479-ball package
					EU		FC-LGA Xeon - 771-land FC-LGA, All others - 775-land FC-LGA
					FF		Micro FCPGA package Core 2 Duo Mobile has 478-pin package
					FV		Plastic PGA
					GJ		387-pin Staggered Plastic PGA
					HH		RoHS-compliant FC-LGA package. Xeon - 771-land FC-LGA6/mLGA, All others - 775-land FC-LGA4
					JM		775-land Flip Chip LGA4 package.
					LE		RoHS-compliant micro FC-BGA package.
					LF		RoHS-compliant micro FC-PGA package. Core2 Duo mobile and Celeron M CPUs have 478-pin package.
					NE		RoHS-compliant micro FC-PGA package with integrated heatsink. Celeron D CPUs have 478-pin micro FC-PGA2 package. Itanium 2 has 611-pin FC-PGA4 package. Xeon has 604-pin package.
					KB		387-pin staggered ceramic PGA
					KC		Micro-BGA package (Mobile Celeron, Pentium II). Slot 1 package (Pentium III)
					KP		Micro-PGA package.
					KW		Micro-FCBGA package.
					KX		387-pin staggered ceramic PGA
					RB		370-pin FC-PGA.
					RH		478-pin Micro FC-PGA package.
					RJ		Micro FC-BGA package. For Celeron M, Pentium M and Mobile Pentium III-M it's a 479-ball micro FC-BGA.
					RK		Micro FC-PGA package with integrated heatsink. Celeron D, Mobile Pentium 4 and Pentium 4 have 478-pin package, Xeon has 604-pin FC-PGA2 on microPGA interposer, Celeron has 370-pin FC-PGA2.
					RN		Micro-BGA package on microPGA interposer. Pentium 4 has 423-pin OLGA/PPGA. Xeon MP has 603-pin FC-BGA/mPGA.
					YA		OLGA on 611-pin PGA interposer
					YD		423-pin OLGA/PPGA package (Pentium 4).
					YF		603-pin OLGA/mPGA (Xeon MP)
					YK		OLGA on 611-pin PGA interposer

Note to the table above:

It is possible to break the item "CPU family and Microprocessor core" into two pieces - 5-digit core technology and one-letter CPU class, but this results in much less accurate identification.

5-digit core technology code can be used to identify base core and manufacturing process. In some cases it's not possible to tell correct CPU core just knowing the 5-digit code. For instance, 80528 Pentium 4s and 80528 Xeons have different core names.

CPU class can be used to distinguish between desktop/mobile, and server/workstation/budget processors. Here is how the most common CPU classes can be decoded:

G - high-performance mobile processor (Mobile Pentium II/III/M, Core 2 Duo mobile)
K - server-class processor (Xeon)
N - budget mobile processor (Mobile Celeron, Celeron M)
P - workstation-class processor (Pentium, Core 2 Duo)
R - budget processor (Celeron)

Unfortunately, some Intel processors do not conform to these conventions. For instance, mobile Pentium II processors should have CPU class "G", but they actually have class "K" in their part number.

Modern Boxed CPUs identification

¹	²	³	⁴	⁵
BX	80532	C	2000	B

					5. Processor features or L2 cache size
					128	128 KB L2 cache
					B	0.13 micron, 128 KB L2 cache
					C	0.09 micron, 256 KB L2 cache
					CN	0.09 micron, 256 KB L2 cache, EM64T technology
					D	0.13 micron, 512 KB L2 cache
					E	0.09 micron, 1 MB L2 cache
					EJ	0.09 micron, 1 MB L2 cache, Execute disable bit feature
					EK	0.09 micron, 1 MB L2 cache, EM64T technology, includes ATX thermal module
					EKT	0.09 micron, 1 MB L2 cache, EM64T technology, includes BTX thermal module
					F	0.09 micron: 2 MB L2 cache, EM64T technology, includes ATX thermal module 0.13 micron: 512 KB L2 cache, 2 MB level 3 cache
					FN	0.09 micron: 2 MB L2 cache, EM64T technology, includes ATX thermal module
					FS	0.13 micron, 2 MB L2 cache, LGA775 package
					FT	0.09 micron, 2 MB L2 cache, EM64T technology, includes BTX thermal module

					4. Frequency (MHz)

					3. Bus speed
					C	400 MHz (effective), 100 MHz (actual)
					E	533 MHz (effective), 133 MHz (actual)
					G	800 MHz (effective), 200 MHz (actual)
					H	1066 MHz (effective), 266 MHz (actual)

					2. CPU family and Microprocessor core
					80532P	Desktop Pentium (Northwood core, 0.13 micron)
					80532R	Celeron (Northwood core, 0.13 micron)
					80546P	Desktop Pentium 4 (Prescott core, 0.09 micron, micro FC-PGA package, socket 478)
					80546R	Celeron D (Prescott core, 0.09 micron, micro FC-PGA package, socket 478)
					80547P	Desktop Pentium 4 (Prescott core, 0.09 micron, FC-LGA package, socket 775)
					80547R	Celeron D (Prescott core, 0.09 micron, FC-LGA package, socket 775)
					80551P	Pentium D (Smithfield core, 0.09 micron)

					1. Boxed processor

Last modified: 2 Apr 2008


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