CPU SOCKET ID GUIDE

Added the new AMD Sockets (Socket M2, F and S1)
Added picture for PAC611 and PAC418

This list is complete for x86 4th generation and up.

486	Pentium	P6	7th Gen	8th Gen
Original	Socket 4	Socket 8	Slot A	Socket 754
Socket 1	Socket 5	Slot 1	Socket A	Socket 939
Socket 2	Socket 7	Slot 2	Socket 423	Socket 940
Socket 3	Nx586	Socket 370	Socket 478	PAC418
Socket 6		Socket 370S	LGA 775 -Socket T	PAC611
			Socket 603/604	Socket M2
			Socket 479	Socket F
				Socket S1

Notes
Abbreviations

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Sockets	Pin Holes	Typical Voltages	Typical Bus Speeds	Typical Multipliers	Typical Chipsets	Processors
486 Socket 486 bus	168 pin LIF	5v	20MHz 25MHz 33MHz	1.0x 2.0x 3.0x	?	486DX 20~33 486DX2 50~66 486DX4 75~120¹ 486DXODPR 25-33 486DX2ODPR 50~66 486DX4ODPR 75~100 Am5x86 133¹ Cx5x86 100~120¹ Cx486S 25-40 Cx486 DX 25-50 Cx486 DX2 50-80 -- ComputerNerd RA4 Gainbery 5x86 133 Kingston TurboChip 133 PowerLeap PL/586 133 PowerLeap PL-Renaissance/AT Trinity Works 5x86-133 HyperTec HyperRace 586
486 Bus	169 pin LIF 169 pin ZIF	5v	16MHz 20MHz 25MHz 33MHz	1.0x 2.0x 3.0x	?	486SX 16~33 486SX2 50~66 486SXODP 25~33 486SX2ODP 50 486DX 20~33 486DX2 50~66 486DX4 75~120¹ 486DXODP 25~33 486DXODPR 25-33 486DX2ODP 50~66 486DX4ODP 75~100 486DX2ODPR 50~66 486DX4ODPR 75~100 Am5x86 133¹ Cx5x86 100~120¹ Cx486S 25-40 Cx486 DX 25-50 Cx486 DX2 50-80 -- ComputerNerd RA4 Evergreen 586 133 Gainbery 5x86 133 Kingston TurboChip 133 Madex 486 PowerLeap PL/586 133 PowerLeap PL-Renaissance/AT Trinity Works 5x86-133 HyperTec HyperRace 586
486 bus	238 pin LIF 238 pin ZIF	5v	25MHz 33MHz 40MHz 50MHz	1.0x 2.0x 3.0x	Intel 420TX (Saturn) VLSI 82C480	486SX 25~33 486SX2 50~66 486SXODP 25~33 486SX2ODP 50 486DX 25~50 486DX2 50~80 486DX4 75~120¹ 486DXODP 25~33 486DXODPR 25-33 486DX2ODP 50~66 486DX4ODP 75~100 486DX2ODPR 50~66 486DX4ODPR 75~100 Pentium ODP 63~83 Am5x86 133¹ Cx5x86 100~120¹ Cx486S 25-40 Cx486 DX 25-50 Cx486 DX2 50-80 -- ComputerNerd RA4 Evergreen 586 133 Gainbery 5x86 133 Kingston TurboChip 133 Madex 486 PowerLeap PL/586 133 PowerLeap PL-Renaissance/AT Trinity Works 5x86-133 HyperTec HyperRace 586
486 bus	237 pin LIF 237 pin ZIF	3.3v 5v	25MHz 33MHz 40MHz 50MHz	1.0x 2.0x 3.0x	ALi M1429 ALi M1439 ALi M1489 (FinALi) Intel 420EX (Aries) Intel 420TX (Saturn) Intel 420ZX (Saturn-II) OPTi 82C495 OPTi 82C895 SiS 85C406 SiS 85C461 SiS 85C471 SiS 85C49x UMC UM8498 UMC UM888x VIA 82C496 (Pluto)	486SX 25~33 486SX2 50~66 486SXODP 25~33 486SX2ODP 50 486DX 25~50 486DX2 50~80 486DX4 75~120 486DXODP 25~33 486DXODPR 25-33 486DX2ODP 50~66 486DX4ODP 75~100 486DX2ODPR 50~66 486DX4ODPR 75~100 Pentium ODP 63~83 Am5x86 133 Cx5x86 100~120 Cx486S 25-40 Cx486 DX 25-50 Cx486 DX2 50-80 Cx486 DX2V 50-80 Cx486 DX4 75-120 -- ComputerNerd RA4 Evergreen 586 133 Gainbery 5x86 133 Kingston TurboChip 133 Madex 486 PowerLeap PL/586 133 PowerLeap PL-Renaissance/AT PowerLeap PL-Renaissance/PCI Trinity Works 5x86-133 HyperTec HyperRace 586
P5 bus	273 pin LIF 273 pin ZIF	5v	60MHz 66MHz	none	Intel 430LX (Mercury) OPTi 82C546 (Python) OPTi 82C596 (Cobra)	Pentium 60~66 Pentium OverDrive 120~133 -- Computer Nerd RA3 Evergreen AcceleraPCI PowerLeap PL/54C PowerLeap PL/54CMMX PowerLeap PL-Renaissance/AT PowerLeap PL-Renaissance/PCI Trinity Works P6x
P54C bus	296 pin LIF 296 pin ZIF 320 pin LIF 320 pin ZIF	STD VR VRE	50MHz 60MHz 66MHz	1.5x 2.0x	ALi Aladdin III ALi Genie Intel 430FX (Triton I) Intel 430NX (Neptune) OPTi 82C546 (Python) OPTi 82C596 (Cobra) OPTi Vendetta SiS 501/02/03 SiS 5511/12/13 SiS 5571 (Trinity) SiS 5581/82 SiS 5596 (Genesis) SiS 5597/98 (Jedi) UMC 881x VIA Apollo Master VLSI 82C59x	K5 PR75~PR133 6x86L PR120+~PR166+¹ 6x86 PR90+~PR200+ Pentium 75~133 Pentium ODP 125~166 -- K6 166~300¹ K6-2 266~400¹ Winchip 180~200 Winchip-2 200~240 Winchip-2A 233 6x86MX PR166~PR233¹ Pentium ODP MMX 125~180 Pentium MMX 166~233¹ -- Concept Manuf. VA55C Evergreen PR166 Evergreen MxPro Evergreen AcceleraPCI Evergreen Spectra Kingston TurboChip Madex 586 PNY QuickChip 200 PNY QuickChip-3D 200 PowerLeap PL/OD54C PowerLeap PL-ProMMX PowerLeap PL/K6-III PowerLeap PL-Renaissance/AT PowerLeap PL-Renaissance/PCI Trinity Works P7x
486 bus	235 pin ZIF	3.3v 3.45v	25MHz 33MHz 40MHz	2.0x 3.0x	Never Implemented in industry	486DX4 75~120
P54C bus P55C bus	296 pin LIF 321 pin ZIF	Split STD VR VRE VRT	40MHz 50MHz 55MHz 60MHz 62MHz 66MHz 68MHz 75MHz 83MHz 90MHz 95MHz 100MHz 102MHz 112MHz 124MHz	1.5x 1.75x 2.0x 2.33x 2.5x 2.66x 3.0x 3.33x 3.5x 4.0x 4.5x 5.0x 5.5x 6.0x	ALi Aladdin III ALi Aladdin IV ALi Aladdin IV+ ALi Aladdin V ALi Aladdin V+ ALi Aladdin 7 AMD 640 Intel 430FX (Triton I) Intel 430HX (Triton II) Intel m430MX (Ariel) Intel 430TX Intel 430VX (Triton II/III) OPTi 82C556 (Viper) OPTi 82C566 (ViperMax) OPTi 82C576 (Viper Xpress) OPTi 82C750 (Vendetta) SiS 530 (Sinbad) SiS 540 SiS 5511/12/13 SiS 5571 (Trinity) SiS 5581/82 SiS 5591/92 (David) SiS 5596 (Genesis) SiS 5597/98 (Jedi) VIA Apollo Master VIA Apollo MVP3 VIA Apollo MVP4 VIA Apollo VP-1 VIA Apollo VP-2 VIA Apollo VP-2/97 VIA Apollo VP-3 VIA Apollo VPX VIA Apollo VPX/97 VLSI 82C541 (Lynx)	K5 PR75~PR200 6x86 PR90+~PR200+ 6x86L PR120+~PR200+ Pentium 75~200 Pentium ODP 125~166 -- K6 166~300 K6-2 266~570 K6-2+ 450~550 K6-III 400~450 K6-III+ 450~500 Winchip 150~240 Winchip-2 200~240 Winchip-2A/B - 200~300 6x86MX PR166~PR333 M II 233~433 Pentium ODP MMX 125~200 Pentium MMX 166~266 Rise mP6 166~266 -- Computer Nerd RA5 Concept Manuf. VA55C Evergreen PR166 Evergreen MxPro Evergreen AcceleraPCI Evergreen Spectra Kingston TurboChip Madex 586 PNY QuickChip-3D 200 PowerLeap PL/OD54C PowerLeap PL/ProMMX PowerLeap PL/K6-III PowerLeap PL-Renaissance/AT PowerLeap PL-Renaissance/PCI
NexGen NexBus (64 bit)	463 pin ZIF	4V	35, 37.5, 42, 46.5, 51, 55.5	2.0x	NexGen NxVL or NxPCI	PR75: 70 PR80: 75 PR90: 84 PR100: 93 PR110: 102 PR120: 111

P6 bus	387 pin LIF 387 pin ZIF	VID VRM (2.1v~3.5v)	60MHz 66MHz 75MHz	2.0x 2.5x 3.0x 4.5x 5.0x 5.5x 6.0x 6.5x 7.0x 7.5x 8.0x	Corollary Profusion Intel 440FX (Natoma) Intel 450GX (Orion) Intel 450KX (Mars) OPTi 650 (Discovery) VIA Apollo P6	Pentium Pro 150~200 Pentium II OverDrive 300~333 -- Evergreen AcceleraPCI PowerLeap PL-Pro/II PowerLeap PL-Renaissance/AT PowerLeap PL-Renaissance/PCI
Slot 1 P6 bus	242 pin SECC 242 pin SECC2 242 pin SEPP	VID VRM (1.3v~3.3v)	60MHz 66MHz 68MHz 75MHz 83MHz 100MHz 102MHz 112MHz 124MHz 133MHz	3.5x 4.0x 4.5x 5.0x 5.5x 6.0x 6.5x 7.0x 7.5x 8.0x 8.5x 9.0x 9.5x 10.0x 10.5x 11.0x 11.5x	ALi Aladdin Pro I ALi Aladdin Pro II ALi Aladdin TNT2 ALi Aladdin Pro 4 Intel 440BX Intel 440EX Intel 440FX (Natoma) Intel 440GX Intel 440LX Intel 810 (Whitney) Intel 810e (Whitney) Intel 815 (Solano) Intel 815e (Solano-2) Intel 820 (Camino) Intel 820e (Camino-2) Intel 840 (Carmel) Micron Samurai SiS 5600 SiS 600 SiS 620 SiS 630 SiS 630E SiS 630S VIA Apollo P6 VIA Apollo Pro VIA Apollo Pro+ VIA Pro133 VIA Pro133A VIA Pro266 VIA PM-133 VIA PM601	Celeron 266~300 (Covington) Celeron 300A~433 (Mendocino) Celeron 300A~533¹ (Mendocino PGA) Celeron 500A~1.1GHz¹ (Coppermine-128) Pentium Pro 150~200¹ Pentium II 233~300 (Klamath) Pentium II 266~450 (Deschutes) Pentium III 450~600B (Katmai) Pentium III 533EB~1.13GHz (Coppermine) -- Evergreen Performa New Wave NW Slot-T PowerLeap PL/PII PowerLeap PL-iP3 PowerLeap PL-iP3/T various Slotket adapters
Slot 2 P6 bus	330 pin SECC	VID VRM (1.3v~3.3v) Some Zeons have onboard voltage regulation (12V) aosme need seperate regulators 2.2V)	100MHz 133MHz	4.0x 4.5x 5.0x 5.5x 6.0x 6.5x 7.0x	Intel 440GX Intel 450NX Intel 840 (Carmel) Intel Profusion Serverset III LC Serverset III LE Serverset III HE-SL Serverset III HE	Pentium II Xeon 400~450 (Drake) Pentium III Xeon 500~550 (Tanner) Pentium III Xeon 600~1GHz (Cascades)
Socket 370 P6 bus There is a 1 pin difference between Socket 7 and Socket 370 as well as an extra row of pins on the inner edge of the socket. They are however, electrically VERY different.	370 pin ZIF	VID VRM (1.05v~2.1v)	66MHz 100MHz 133MHz ~~200MHz~~	4.5x 5.0x 5.5x 6.0x 6.5x 7.0x 7.5x 8.0x 8.5x 9.0x 9.5x 10.0x 10.5x 11.0x 11.5x 12.0x 13.0x 14.0x	ALi Aladdin TNT2 ALi Aladdin Pro 4 ALi Aladdin Pro 5 ALi Aladdin Pro 5T Intel 440BX Intel 440ZX Intel 810 (Whitney) Intel 810e (Whitney) Intel 810e2 (Whitney) Intel 815 (Solano) Intel 815e (Solano-2) Intel 815eg (Solano-3) Intel 815ep (Solano-3) Intel 815g (Solano-3) Intel 815p (Solano-3) Intel 820 (Camino) Intel 820e (Camino-2) Intel 830G (Almador) Intel 830P (Almador) SiS 630 SiS 630E SiS 630ET SiS 630S SiS 630ST SiS 633 SiS 633T SiS 635 SiS 635T ~~SiS 640T~~ VIA Apollo Pro+ VIA Pro133A VIA Pro133T VIA Pro266 VIA Pro266T VIA PL-133 VIA PL-133T VIA PLE133 (PM601) VIA PLE133T VIA PM-133 VIA PM-266T VIA Pro333T	~~M3 600~??? (Mojave)~~ Celeron 300A~533 (Mendocino) Celeron 500A~1.1GHz (Coppermine-128) Celeron 900A~1.4GHz (Tualatin) Pentium III 500E~1.13GHz (Coppermine) Pentium III 866~1.13GHz (Coppermine-T) Pentium III 1.0B~1.33GHz (Tualatin) Pentium III-S 700~*???* (Tualatin) ~~Cyrix III PR433~PR533 (Joshua)~~ Cyrix III 533~667 (Samuel) C3 733A~800A (Samuel 2) C3 800A~866A (Ezra) C3 800T~1.0T (Ezra-T) C3 1.0~1.4 (Nehemiah) C3 (Esther) New Wave NW 370T PowerLeap PL Neo-S370
Socket 370S P6 Bus Pin locations are slightly different then the Socket 370 in 2 of the corners (keying corners)	370pin ZIF	1.48V?	66MHz (x4)	9.0x 10.0 x	Integrated in the CPU	Timna 600 Timna 667
Slot A EV6 bus	242 pin SECC	VID VRM (1.3v~2.05v)	100MHz (x2) 133MHz (x2)	5.0x 5.5x 6.0x 6.5x 7.0x 7.5x 8.0x 8.5x 9.0x 9.5x 10.0x	AMD 750 (Irongate) VIA KX-133	Athlon 500~700 (K7) Athlon 550~1GHz (K75) Athlon 650~1GHz (Thunderbird) ~~Athlon Ultra (Mustang)~~
Socket A (462) EV6 bus Socket A Compact	462 pin ZIF	VID VRM (1.1v~2.05v)	100MHz (x2) 133MHz (x2) 166MHz (x2) 200MHz (x2)	6.0x 6.5x 7.0x 7.5x 8.0x 8.5x 9.0x 9.5x 10.0x 10.5x 11.0x 11.5x 12.0x 12.5x 13.0x 13.5x 14.0x 14.5x 15.0x	ALi MAGiK 1 ALi MAGiK 2 ALi Aladdin K7 III ALi M1667 AMD 750 (Irongate) AMD 760 (Irongate-4) AMD 760MP (Irongate-4) AMD 760MPX (Irongate-4) ~~AMD 770~~ ATI IGP 320 NVidia nForce220 (Crush 11) NVidia nForce220D (Crush 11) NVidia nForce230 (Crush 11) NVidia nForce230-T (Crush 11) NVidia nForce415D (Crush 12) NVidia nForce420 (Crush 12) NVidia nForce420D (Crush 12) NVidia nForce430 (Crush 12) NVidia nForce430-T (Crush 12) NVidia nForce615D (Crush ?) NVidia nForce620D (Crush ?) NVidia nForce2-G IGP (Crush 18) NVidia nForce2-GT IGP (Crush 18) NVidia nForce2-S SPP (Crush 18) NVidia nForce2-ST SPP (Crush 18) NVidia nForce2 400 (Crush 18) NVidia nForce2 Ultra 400 (Crush 18) SiS 730S SiS 733 SiS 735 SiS 740 SiS 741 SiS 745 SiS 746 ~~SiS 746DX~~ SiS 746FX SiS 748 ~~SiS 750~~ SiS 760 VIA KL-133 VIA KL-133A VIA KLE133 VIA KM-133 VIA KM-133A VIA KM-266 ~~VIA KM-333~~ VIA KM-400 VIA KT-133 VIA KT-133A VIA KT-133E VIA KT-266 VIA KT-266A ~~VIA KT-266DP~~ VIA KT-333 VIA KT-333A VIA KT-400 VIA KT-400A KT-600 KT-880 Micron: Scimitar Mamba Shogun	Duron 600~950 (Spitfire) Duron 1.0GHz~1.3GHz (Morgan) ~~Duron 1.33G (Appaloosa)~~ Duron 1.4GHz~1.8GHz (Applebred) Athlon 650~1.4GHz (Thunderbird) ~~Athlon Ultra (Mustang)~~ Athlon 4 850~*???* (mobile Palomino) Athlon MP 1.0GHz~2100+ (Palomino) Athlon MP 2000+~2600+ (Thoroughbred) Athlon MP 2800+ (Barton) Athlon XP 1500+~2100+ (Palomino) Athlon XP 1600+~2800+ (Thoroughbred) Athlon XP 2500+~3200+ (Barton) Athlon XP 2000+~2400+ (Thorton) ~~Athlon XP (Thoroughbred-S)~~ Sempron 2300+ (Thoroughbred)
Socket 423 P6.8 bus	423 pin ZIF	VID VRM (1.0v~1.85v)	100MHz (x4)	13.0x 14.0x 15.0x 16.0x 17.0x 18.0x 19.0x 20.0x	Intel 845 (Brookdale) Intel 850 (Tehama) VIA P4X-266	Pentium 4 1.3GHz~2.0GHz (Willamette) Pentium 4 1.6A~*???*¹ (Northwood) Celeron 1.7GHz~1.8GHz¹ (Willamette) -- New Wave NW 478 Powerleap PL-P4/W Powerleap PL-P4/N
Socket 478 P6.8 bus	478 pin ZIF	VID VRM	100MHz (x4) 133MHz (x4) 200MHz (x4)	12.0x 13.0x 14.0x 15.0x 16.0x 17.0x 18.0x 19.0x 20.0x 21.0x 22.0x 23.0x 24.0x 25.0x 26.0x 27.0x 28.0x	ALi Aladdin P4 ALi Aladdin P4A ALi M1672 ALi M1681 ALi M1741 ATI IGP 330 ATI IGP 340 ~~ATI IGP ??? (RS-250)~~ ATI 9000 Pro IGP (RC-350) ATI 9100 IGP (RS-300) ATI 9100 Pro IGP (RS-350) ATI ??? (RX-300) ATI ??? (RS-400) Intel 845 (Brookdale) Intel 845B (Brookdale DDR) Intel 845E (Brookdale-E) Intel 845G (Brookdale-G) Intel 845GE (Brookdale-GE) Intel 845GL (Brookdale-GL) Intel 845GV (Brookdale-GV) Intel 845PE (Brookdale-PE) Intel 848P Intel 850 (Tehama) Intel 850e (Tehama-E) ~~Intel 855 (Tulloch)~~ Intel E7205 (Granite Bay) Intel 865P (Springdale-P) Intel 865PE (Springdale-PE) Intel 865G (Springdale-G) Intel 875P (Canterwood) Intel 915GL SiS 645 SiS 645DX SiS 648 SiS 648DX SiS 648FX SiS 650 SiS 650GX SiS 651 SiS 655 SiS 655FX SiS 655TX ~~SiS 660~~ SiS 661FX/GX SiS R658 SiS R659 VIA P4M-266 VIA P4M266A VIA P4M-333 VIA P4X-266 VIA P4X-266A VIA P4X-266E VIA P4X-333 VIA P4X-400 VIA P4M800 VIA P4X-400A VIA PT-600 VIA PT-800 VIA PM800 VIA PT-880	Celeron 1.7GHz~1.8GHz (Willamette) Celeron 2.0GHz~*???* (Northwood-128) Celeron D 310~*???* (Prescott) Pentium 4 1.4GHz~2.0GHz (Willamette) Pentium 4 1.6A~3.4C (Northwood) Pentium 4 Extreme 3.2GHz~*???* (Gallatin) Pentium 4 2.8A~*???* (Prescott) Pentium M (725-7xx) (Dothan)

Socket 479 P6.8 bus	478 pin ZIF	VID VRM	100-133MHz (x4)	12.0x 13.0x 14.0x 15.0x 16.0x 17.0x 18.0x 19.0x 20.0x 21.0x 22.0x 23.0x 24.0x 25.0x 26.0x 27.0x 28.0x	Intel 855GME Intel 915G	Intel Pentium M (705-765) (Dothan / Banias)
LGA 775 P6.8 bus This is a LGA style Socket.	775 ball FC-LGA	VID VRM	200MHz (x4) 266MHz (x4)	13.0x 14.0x 15.0x 16.0x 17.0x 18.0x 19.0x 20.0x	Intel 865PE (Springdale-PE) Intel 848P Intel 865GV/PE Intel 915P (Grantsdale) Intel 915G/L/PL (Grantsdale-G) Intel 925X (Alderwood) Intel 945G/P Intel 955X VIA PM800 VIA P4M800 VIA PT880 SiS 648FX SiS 661FX Nvidia Nforce 4 SLi	Celeron-D 2533-3066 (326-345) Pentium 4 505~*6xx* (Prescott) Pentium D (820-8xx) (Smithfield) ~~Pentium 4 3GHz+ (Tejas)~~ *Pentium 4 3GHz+* (Nehalem) Pentium 4 Extreme 3.4GHz~*???* (Gallatin) *Pentium 4 Extreme 720~???* (?)
Socket 603 Socket 604 P6.8 bus	603 pin ZIF 604 pin ZIF	VID VRM (1.1v~1.85v)	100MHz (x4) 133MHz (x4) ~~166MHz (x4)~~ 200MHz (x4)	14.0x 15.0x 16.0x 17.0x 18.0x 19.0x 20.0x 21.0x 22.0x 23.0x 24.0x 25.0x 26.0x 27.0x 28.0x	*IBM Summit* Intel 860 (Colusa) ~~Intel 860E (Colusa-E)~~ ~~Intel 870~~ Intel E7500 (Plumas) Intel E7501 (Plumas 533) ~~Intel ? (Plumas LE)~~ Intel E7505 (Placer) Intel E7320 (Lindenhurst-VS) Intel E7520 Intel E7325 (Lindenhurst) Intel E7525 (Tumwater) Serverset GC-LE WS Serverset GC-LE Serverset GC-HE	Xeon 1.4GHz~2.0GHz (Foster) LV Xeon 1.6GHz~2.0GHz (Prestonia) Xeon 1.8GHz~3.06GHz (Prestonia) Xeon 3.06GHz~*???* (Gallatin) Xeon 2.8GHz~*???* (Nocona) Xeon 3.0-xxx (Irwindale) ~~Xeon ??? (Jayhawk)~~ Xeon MP 1.4GHz~1.6GHz (Foster MP) Xeon MP 1.5GHz~*???* (Gallatin) *Xeon MP ???* (Potomac) *Xeon MP ???* (Tulsa)
PAC418 P7 bus	418 pin VLIF (plus power slot)	VID VRM (1.5v)	133MHz (x2)	5.5x 6.0x	Intel 460GX	Itanium 733~800 (Merced) Several Other lower speeds for ES chips
PAC611 P7 bus	611 pin VLIF (plus power slot)	VID VRM (1.5v)	200MHz (x2)	4.5x 5.0x 6.5x 7.0x 7.5x	*IBM Summit* Intel 460GX Intel E8870 HP ZX1	Itanium 2 900MHz~1.0GHz (McKinley) Itanium 2 1.3GHz~*???* (Madison) *Itanium 2 1GHz+* (Deerfield) *Itanium 2 1GHz+* (Montecito) *Itanium 2 1GHz+* (Shavano) *Itanium 2 1GHz+* (Tanglewood) *Itanium 2 1GHz+* (Fanwood) *Itanium 2 1GHz+* (Millington)
Socket 754 K8 bus	754 pin ZIF	VID VRM (0.8v~1.55v)	200MHz (x2)	10.0x 11.0x 12.0x	ALi M1687 *ALi M1688* ALi M1689 ATI Radeon XPRESS 200 ATI (RS-380) ATI (RX-380) ATI (RS-480) ATI (RX-480) NVidia nForce3 NVidia nForce3 250 NVidia nForce4 SiS 755 SiS 760GX VIA K8M-800 VIA K8T-800 VIA K8T-800 Pro	Athlon 64 2800~3700+ (Clawhammer) Mobile Athlon 64 3000+ (Clawhammer) Athlon 64 3000+ (Newcastle) Sempron 2600+ (Palmero) Sempron 64 2600+ (Palmero)
Socket 940 K8 bus	940 pin ZIF	VID VRM (0.8v~1.55v)	200MHz (x2)	7.0x 8.0x 9.0x 10.0x 11.0x 12.0x	ALi M1687 *ALi M1688* ALi M1689 AMD 8000 (Golem) AMD Lokar ATI ??? (RS-380) ATI ??? (RX-380) ATI ??? (RS-480) ATI ??? (RX-480) NVidia nForce3 NVidia nForce3 Pro 150 NVidia nForce3 Pro 250 NVIDIA nForce Pro 2200 SiS 755 SiS 760 *VIA K8T-400M* VIA K8T-800 VIA K8T-800 Pro Newisys Sobek Newisys Khepri	Athlon 64 FX-51~FX-53 (Sledgehammer) ~~Opteron ??? (Clawhammer DP)~~ Opteron 140~*???* (Sledgehammer) Opteron 240~250 (Sledgehammer) Opteron 840~*???* (Sledgehammer) *Opteron ???* (Venus) Opteron 250 (Troy) *Opteron ???* (Athens) *Opteron ???* (Denmark) Opteron 265 (Italy) *Opteron ???* (Egypt)
Socket 939 K8 bus	939 pin ZIF	VID VRM (0.8v~1.55v)	200MHz (x2)	11.0x 12.0x 13.0x 14.0x 15.0x	ALi M1687 *ALi M1688* ALi M1689 ATI (RS-380) ATI (RX-380) ATI RS-480 ATI (RX-480) ATI Radeon XPRESS 200 NVidia nForce3 NVidia nForce3 Pro 150 NVidia nForce3 Pro 250 Nvidia nForce4 Nvidia nForce4 Ultra SiS 755 SiS 760 *VIA K8T-400M* VIA K8T-800 VIA K8T-800 Pro VIA K8T890	*Athlon 64 2GHz+* (Victoria) Athlon 64 (3000-3800) (Venice) Athlon 64 3500+~*???* (Newcastle) *Athlon 64 ???* (Palermo) Athlon 64 FX-53~FX-55 (Sledgehammer) Athlon 64 FX55-57 (San Diego) Athlon 64 X2 4400- (Toledo) Athlon 64 3700 (San Diego) Athlon 64 X2 3800- (Manchester)
Socket M2 K8 Bus	940 pin ZIP	VID VRM (0.8v~1.55v)	200MHz (x2)	11.0x 12.0x 13.0x 14.0x 15.0x	ATI RX485 ATI RS485 RD580 RD580C RS690	Opteron 1xx
Socket F K8 Bus	1207 pin ZIF	VID VRM (0.8v~1.55v)	200MHz (x2)	11.0x 12.0x 13.0x 14.0x 15.0x		Opteron 2xx Opteron 4xx
Socket S1 K8 Bus	638 pin ZIF	VID VRM (0.8v~1.55v)	200MHz (x2)	11.0x 12.0x 13.0x 14.0x 15.0x		Athlom 64 Mobile

¹ - Special voltage and/or pin adapter may be required.

Abbreviations:

LGA - Land Grid Array
LIF - Low Insertion Force socket (no handle).
MD - Minimum Delay (modified timing).
µPGA - Micro Pin Grid Array.
MSPGA - Modified Staggered Pin Grid Array.
ODP - OverDrive Processor.
ODPR - OverDrive Processor Replacement.
PGA - Pin Grid Array.
SECC - Single Edge Contact Cartridge.
SEPP - Single Edge Processor Package (Celeron).
SPGA - Staggered Pin Grid Array.
Split - Split voltages (lower core with a 3.3v I/O).
STD - 3.3v (3.135v ~ 3.465v) - Standard Voltage.
VLIF - Very Low Insertion Force socket.
VR - 3.38v (3.300v ~ 3.465v) - Voltage Regulated.
VRE - 3.52v (3.450v ~ 3.600v) - (B-step) Voltage Regulated Extended.
VRE - 3.5v (3.400v ~ 3.600v) - (C2 step and later) Voltage Regulated Extended.
VRT - 2.9v_core / 3.3v_I/O - split Voltage Reduction Technology (mobile chips only).
VID VRM - Voltage ID Voltage Regulator Module (allows CPU to program VRM to proper voltage).
ZIF - Zero Insertion Force socket (with handle).

Notes:

Socket 7 and Socket 5 are very similar in appearance, but there are significant differences.
- Socket 7 requires 5.0 amps at 3.3v, while Socket 5 only requires 4.33 amps.
- The maximum power dissipation for Socket 7 is 17 watts, two watts higher than Socket 5.
- Vertical clearance above the CPU was raised from 1.35" to 1.75".
- Socket 7 comes with a 321^st pin located at AH-32 to be used for a KEY pin, which is not electronically connected to either the CPU or the motherboard.
- Pin AL-01 is changed to Vcc2DET to identify split-rail voltages within newer processors.
- Socket 7 is defined as a superset of Socket 5, and can handle all the previous processors that worked in Socket 5.
- Also note that most all Socket 5 motherboards only support 1.5x and 2.0x multipliers, making their maximum processor speed 133MHz (66x2.0). And there are also some Socket 5 boards that can only go up to 120MHz.
Earlier Socket 7 motherboards do not have split voltage capabilities required by MMX-capable chips (AMD K6, Cyrix 6x86MX, Intel Pentium MMX) as well as the Cyrix 6x86L processor.
233MHz (66x3.5) chips utilize the 1.5x multiplier as 3.5x on Socket 7 boards that do not have a jumper for 3.5x. Newer motherboards, on the other hand, will add a third jumper (BF2) to take care of higher clock multipliers.
Newer chips that use a 4.0x multiplier or higher require a Socket 7 motherboard that has a third multiplier jumper. Unlike using the '1.5x' setting as '3.5x', setting a motherboard to '2.0x' won't produce a '4.0x' multiplier in the chip.
The 62MHz and 68MHz bus speeds are 'turbo' modes for 60MHz and 66MHz speeds.
As long as it isn't on-Die, the L2 cache on a Slot 1 processor runs at only half the core processor speed. Slot 2 has processors with full-speed L2 cache and larger size caches (1MB, 2MB).
All bus speeds listed on this page are actual speeds; not DDR. The Slot A, Socket A, Socket 423/478, Socket 603, and PAC418 chips all use a dual (2x) or quad-pumped (4x) bus that hits on the rising and falling edges of the clock, yielding a faster effective bus speed. The quad-pumped bus works similar to that of AGP 4x mode (it uses a synchronous signal to double strobe each rising and falling edge).
Crossed out CPU Names and chipset names were never released, only proposed

If you know of any more socket info etc. Please e-mail me and I will add them.

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CPU SOCKET ID GUIDE

486 Socket
486 bus

NexGen

NexBus (64 bit)

Slot 1

P6 bus

Slot 2

P6 bus

Socket 370

P6 bus
There is a 1 pin difference between Socket 7 and Socket 370 as well as an extra row of pins on the inner edge of the socket. They are however, electrically VERY different.

Socket 370S

P6 Bus
Pin locations are slightly different then the Socket 370 in 2 of the corners (keying corners)

Slot A

EV6 bus

Socket A (462)

EV6 bus
Socket A Compact

Socket 423

P6.8 bus

Socket 478

P6.8 bus

Socket 479
P6.8 bus

LGA 775

P6.8 bus
This is a LGA style Socket.

Socket 603

Socket 604

P6.8 bus

PAC418

P7 bus

PAC611

P7 bus

Socket 754

K8 bus

Socket 940

K8 bus

Socket 939
K8 bus

Socket M2

K8 Bus

Socket F
K8 Bus

Socket S1

K8 Bus

CPU SOCKET ID GUIDE

486 Socket 486 bus

NexGen NexBus (64 bit)

Slot 1 P6 bus

Slot 2 P6 bus

Socket 370 P6 bus There is a 1 pin difference between Socket 7 and Socket 370 as well as an extra row of pins on the inner edge of the socket. They are however, electrically VERY different.

Socket 370S P6 Bus Pin locations are slightly different then the Socket 370 in 2 of the corners (keying corners)

Slot A EV6 bus

Socket A (462) EV6 bus Socket A Compact

Socket 423 P6.8 bus

Socket 478 P6.8 bus

Socket 479 P6.8 bus

LGA 775 P6.8 bus This is a LGA style Socket.

Socket 603 Socket 604 P6.8 bus

PAC418 P7 bus

PAC611 P7 bus

Socket 754 K8 bus

Socket 940 K8 bus

Socket 939 K8 bus

Socket M2 K8 Bus

Socket F K8 Bus

Socket S1 K8 Bus

486 Socket
486 bus

NexGen

NexBus (64 bit)

Slot 1

P6 bus

Slot 2

P6 bus

Socket 370

P6 bus
There is a 1 pin difference between Socket 7 and Socket 370 as well as an extra row of pins on the inner edge of the socket. They are however, electrically VERY different.

Socket 370S

P6 Bus
Pin locations are slightly different then the Socket 370 in 2 of the corners (keying corners)

Slot A

EV6 bus

Socket A (462)

EV6 bus
Socket A Compact

Socket 423

P6.8 bus

Socket 478

P6.8 bus

Socket 479
P6.8 bus

LGA 775

P6.8 bus
This is a LGA style Socket.

Socket 603

Socket 604

P6.8 bus

PAC418

P7 bus

PAC611

P7 bus

Socket 754

K8 bus

Socket 940

K8 bus

Socket 939
K8 bus

Socket M2

K8 Bus

Socket F
K8 Bus

Socket S1

K8 Bus