almanach CPU intel
intel bought Acorn CPU & DEC StrongARM CPU division

Official intel S-spec listings
Official intel iComp rating
Pentium marking & reference
Pentium II marking & reference
Pentium III marking & reference

Pre 80x86

4004 Nov 1971    
4040 1972    
8008 Apr 1972    
8048      
8051      
8052      
8080 Apr 1974 2...3.125MHz  
8085 1976 3...6MHz  
8088 Feb 1979 5...12MHz 8bit external bus
8086 May 1978 4...12MHz (8087 copro) 16bit bus, 8080/8085 compatible
iAPX 432      

80x86

  80186/80188 6..20MHz, 1983 XL low power version
2-X-X 80286 6..20MHz, 1982 (80287 copro)  
0-0-00 i80386DX A-step 12MHz  
3-0-03..08 i80386DX 16..33MHz, 1985, 0.8µm DX (double word external)
3-2-04..08 i80386SX "P9" 16..33MHz, 1988 SX (single word external)
3-2-09 i80386SX "P9" 16..25MHz, 1993 embedded 386SX
3-3-05..08 i80376 16..20MHz, 1988 embedded 386SX
3-2-09 i80386CX 12-25MHz, 1993 embedded 386SX
3-2-09 i80386EX 16..25MHz, 1994 embedded 386SX
3-4-10..11 i80386SL 16..33MHz, 1990 w/ chipset 82360SL
3-4-0..1 RapidCAD 25..33MHz, 0.8µm, 1992 486DX overdrive for 386

80486 (P4) 1989

4-0-0..4 i80486DX "P4" 20..33MHz, 1989  
4-1-0..5 i80486DX "P4S" 50MHz, 1991 rev. 4/5 SL enhanced
4-2-0..B i80486SX "P23" 16..33MHz, 0.8µm, 1991 8KB L1
  i80486SX "P23S" 8KB L1 SL enhanced
  i80487SX "P23N" full 486DX, disables 486SX Overdrive for socket1
4-3-2..5 i80486DX2 "P24" 40..66MHz, 1992, 8KB L1  
  i80486DX2 "P24S" 8KB L1 SL enhanced
  i80486DX2 "P23T" 8KB L1 Overdrive for 486SX
4-3-6 i80486DX2WB "P24D" write through mode, 8KB L1  
4-7-X i80486DX2WB write back mode, 8KB L1  
4-4-X i80486SL 25..33MHz, 8KB L1 w/ chipset
  i80486DXL 8KB L1  
4-5-B i80486SX2 50..66MHz, 8KB L1  
4-8-X i80486DX4 "P24C" 1994, 16KB L1  
  i80486DX4 DX4-75/100, 3.45V, 16KB L1 Overdrive for socket3
4-9-X i80486DX4WB 16KB L1  

80500 Pentium (P5) 1993

5-0-X P5 A-stepping 0.8 µm, 60MHz, 16KB L1  

80501 Pentium (P5) 1993

5-0-X P5 A-stepping 0.8 µm, 16KB L1  
5-1-3..5 P5 50-66MHz 0.8 µm, 5.0V FDIV bug
5-1-7 P5 60-66MHz 0.8 µm, 5.0V  
5-1-A P5T 120/133MHz 0.35 µm, 5.0V PODP5V133

80502 Pentium (P54) 1994

5-2-1..2 P54C 75-100MHz 0.6 µm, 16KB L1 FDIV bug
5-2-4 P54C 75-120MHz 0.6 µm FDIV bug
5-2-5..B P54CQS 75-133MHz 0.35 µm  
5-2-C P54CS 75-200MHz 0.35 µm  
5-2-C P54CT 0.35 µm, 3.45V PODP3V125 / 150 / 166
5-3-1 P24T, 63MHz WB / WT, 5.0V PODP5V63 for 486/25
5-3-2 P24CT, 83MHz WB / WT, 5.0V PODP5V83 for 486/33
5-3-2 P24B WB / WT Overdrive for 486
5-7-X P54C 75-100MHz mobile  

80503 Pentium MMX (P55)1997

5-4-3..4 P55C, 133-233MHz 0.28 µm, 32KB L1  
5-4-3 P54CT 0.35 µm, 3.45V PODPMT66X200 / 180
5-4-4 P54CT 0.35 µm, 3.45V PODPMT66X166 / 150
5-5-X P55C   Overdrive for 486DX4
5-6-X P54CTB, 100..200MHz 0.28 µm Overdrive for P54C
5-8-1 P55C, Tillamook, mobile 0.25 µm, 166-266MHz, 1.8V singleCPU
5-8-2 P55C, Tillamook, mobile 0.25 µm, 300MHz, 2.0V singleCPU
5-8-4 (?) P55C, Tillamook, mobile 0.25 µm MMX bug, singleCPU

80521 Pentium Pro (P6) 1995

6-0-X P6 A-step, 120..133MHz 0.5 µm 16KB L1, 256KB L2
  P6L   0KB L2
6-1-1 P6, 150MHz 0.5 µm, 3.1V 256KB L2
6-1-2 P6, 150MHz 0.35 µm, 3.1V 256KB L2
6-1-6 P6, 180-200MHz 0.35 µm, 3.3V 256KB L2
6-1-7 P6, 166-200MHz 0.35 µm, 3.3V 256KB/512KB L2
6-1-9 P6, 166-200MHz 0.35 µm, 3.3V 256KB/512KB/1MB L2
  P6T, 300..333MHz 0.25 µm, 3.3V PII Overdrive for P6
6-4-X P55CT 0.35 µm, 3.3V PPro Overdrive for P54

80522 PII Celeron 1998

6-5-X Covington 0.35 µm, 266-300MHz 32KB L1, 0KB L2
6-6-0 Mendocino 0.28 µm, 300-533MHz, SEPP 128KB L2
6-6-5 Mendocino 0.28 µm, 300-533MHz, PPGA, FSB66 128KB L2
6-8-X Coppermine128 0.28 µm, 533-766MHz FSB66 128KB L2
6-8-6 Coppermine128 0.18 µm, 800+MHz, FSB100 128KB L2

80523 PII 1997

6-3-2 Klamath 0.35 µm, 233-333MHz 32KB L1, 512KB L2
6-3-3..4 Klamath 0.35 µm, 233-300MHz 512KB L2, 512MB cachable
6-5-0 Deschutes 0.25 µm, 333MHz 512KB L2, 4GB cachable
6-5-X Deschutes 0.25 µm, 266..MHz 512KB L2, 4GB cachable
  Dixon (Mobile PII PE) 0.25 µm, 266-400MHz 256KB L2
  Dixon (Mobile PII PE) 0.18 µm, 400MHz 256KB L2
  Dixon (Mobile Celeron) 0.25 µm, 266-466MHz 128KB L2
  Dixon (Mobile Celeron) LV 0.18 µm, 400-500MHz 128KB L2, 1.35V, PIII core
  Tonga (Mobile PII) 0.25 µm, 233-300MHz 0KB L2
canceled Timna, PII w/ Northbridge + AGP 0.18 µm 128KB L2
6-6-X     L2 on die

PII Xeon

6-5-X   400-450MHz 512KB L2
    400-450MHz 1MB L2
    400-450MHz 2MB L2

80525 PIII

6-7-2 Katmai, FSB100 0.25 µm, 450-500MHz 512KB L2, SECC/SECC2, ISSE
6-7-3 Katmai, FSB100/133 0.25 µm, 450-600MHz 512KB L2, SECC2, ISSE
6-8-1..3 Coppermine, FSB100/133 0.18 µm, 500-1000MHz 256KB L2, FCPGA/SECC2
6-8-6 Coppermin128 0.18 µm, 800+MHz 256KB L2, FCPGA
  PIII mobile

0.18 µm, 400-850MHz, 1.6V

 256KB L2
  PIII mobile LV 500-600MHz, 1.35V 256KB L2
  PIII mobile UltraLV 500MHz, 1.1V 256KB L2
  Tualatin, FSB200 0.13 µm, 1.2GHz+ 256/512KB L2

80525 PIII Xeon

  Tanner (Xeon), FSB100 0.25 µm, 500-550MHz 512-2048KB L2, Slot 2, ISSE
  Cascades (Xeon) (E), FSB133 (B) 0.18 µm, 600-733MHz 256-2048KB L2, Slot 2, ISSE
  Gallatin 0.13 µm, 733+MHz 256-2048KB L2, Slot 2, ISSE

15-0-1..4 Willamette ES   0.18 µm, 1.0GHz, FSB400, ISSE2 16KB L1, 256KB L2, PGA423

Pentium 4 (P68)

15-0-5..10 Willamette   0.18 µm, 1.3+GHz, FSB400, ISSE2 8+12KB L1, 256KB L2, PGA423
Prescott integrated Northbridge 0.13 µm, single/dual RDRAM, 1.6+GHz mPGA478 (former socket 479)
Foster   Willamette w/ DualCPU support 256KB L2, Slot M (socket 603 ?)
Northwood   0.13 µm Willamette  
Prestonia   0.13 µm Foster  

  integrated Northbridge, wireless LAN successor of Timna, mobile  

Banias

IA 32 - II

Flaggstaff   0.13 µm 4-8MB L2

Merced step A3   500MHz 32KB L1, 96KB L2, no L3
Merced step B1   667MHz 32KB L1, 96KB L2, 2-4MB L3
Merced step B2   800MHz 32KB L1, 96KB L2, 2-4MB L3

Itanium (P7)

Merced step C FSB400 0.18 µm, 450-600MHz Slot M, 32KB L1, 96KB L2, 2-4MB L3
McKinley   0.18 µm, 800+MHz, 2001 Slot M, 4MB L3
Madison   0.13 µm, 1.2+GHz, Cu, 2002 Slot M, 4+MB L3 on die
Deerfield   0.13 µm, 1.2+GHz, Cu, 2002 Slot M


SpeedStep ('Geyserville', flexible clock rate & voltage)
MMC2 has custom chip on back side (JAPAN, 724663, 53502)

80522 Klamath core 0.35
80523 Deschutes core 0.28
80525 Katmai core 0.25
8052x Coppermine core 0.18
E means .18 Coppermine
B means 133MHz FSB

486DX2 (x2)
486DX3 (x2.5) never released
486DX4 (x3)
486DX5 (x4) never released (AMD 5x86)

MultiProcessing
Pentium (max. Dual-CPU)
PentiumPro (max. Quad-CPU)
Pentium II (max. Dual-CPU)
Pentium III (max. Dual-CPU)
Xeon (max. Quad-CPU)

iAPX 432 (only prototyped, 1981, never released)

i860
80860XP
i960
80960RP
80960MC
80960RN (64bit PCI 33MHz, FSB100, SDRAM PC66, XOR)
80960RM (RN w/ 64+32bit PCI, four way systems)
80960RS (32bit PCI 33MHz, FSB100, SDRAM PC66)
80303 'Zion' (64bit PCI 66MHz, FSB100, XOR)
8030? 'Verde' (PCI-X, 600MHz CPUs, SDRAM 266, XOR, four and eight way)