Processor Slot Table

CPU Socket and Slot Types and Specifications

Chip Class

Socket

Pins

Layout

Voltage

Supported Processors

Introduced

Intel/AMD 486 class

Socket 1

169

17x17 PGA

5V

486 SX/SX2, DX/DX2, DX4 OD

Apr. '89

 

Socket 2

238

19x19 PGA

5V

486 SX/SX2, DX/DX2, DX4 OD, 486 Pentium OD

Mar. '92

 

Socket 3

237

19x19 PGA

5V/3.3V

486 SX/SX2, DX/DX2, DX4, 486 Pentium OD, AMD 5x86

Feb. '94

 

Socket 6 [1]

235

19x19 PGA

3.3V

486 DX4, 486 Pentium OD

Feb. '94

Intel/AMD 586 (Pentium) class

Socket 4

273

21x21 PGA

5V

Pentium 60/66, OD

Mar. '93


Socket 5

320

37x37 SPGA

3.3V/3.5V

Pentium 75-133, OD

Mar. '94


Socket 7

321

37x37 SPGA

VRM

Pentium 75-233+, MMX, OD, AMD K5/K6, Cyrix M1/II

June '95

Intel 686 (Pentium II/III) SPGA

Socket 8

387

Dual-pattern SPGA

Auto VRM

Pentium Pro, OD

Nov. '95

class

Slot 1 (SC242)

242

Slot

Auto VRM

Pentium II/III, Celeron SECC

May '97

 

Socket 370

370

37x37 SPGA

Auto VRM

Celeron/Pentium III PPGA/FC-PGA

Nov. '98

Intel Pentium 4 class

Socket 423

423

39x39 SPGA

Auto VRM

Pentium 4 FC-PGA

Nov. '00


Socket 478

478

26x26 mPGA

Auto VRM

Pentium 4/Celeron FC-PGA2

Oct. '01


Socket T (LGA775)

775

30x33 LGA

Auto VRM

Pentium 4/Celeron/Pentium D/Pentium Extreme Edition/LGA775

June '04

AMD K7 class

Slot A

242

Slot

Auto VRM

AMD Athlon SECC

June '99

 

Socket A (462)

462

37x37 SPGA

Auto VRM

AMD Athlon/Athlon XP/Duron PGA/FC-PGA

June '00

AMD K8 class

Socket 754

754

29x29 mPGA

Auto VRM

AMD Athlon 64

Sep. '03

 

Socket 939

939

31x31 mPGA

Auto VRM

AMD Athlon 64 v.2

June '04

 

Socket 940

940

31x31 mPGA

Auto VRM

AMD Athlon 64FX, Opteron

Apr. '03

Intel/AMD server and workstation class

Slot 2(SC330)

330

Slot

Auto VRM

Pentium II/III Xeon

Apr. '98


Socket 603

603

31x25 mPGA

Auto VRM

Xeon (P4)

May '01


Socket 604

604

31x25 mPGA

Auto VRM

Xeon (P4)

Oct. '03


Socket PAC418

418

38x22

Auto VRM split SPGA

Itanium

May '01


Socket PAC611

611

25x28

Auto VRM mPGA

Itanium 2

July '02


Socket 940

940

31x31 mPGA

Auto VRM

AMD Athlon 64FX, Opteron

Apr. '03

FC-PGA = Flip-chip pin grid array







FC-PGA2 = FC-PGA with an Integrated Heat Spreader (IHS)







OD = OverDrive (retail upgrade processors)







PAC = Pin array cartridge







PGA = Pin grid array







PPGA = Plastic pin grid array







SC242 = Slot connector, 242 pins







SC330 = Slot connector, 330 pins







SECC = Single edge contact cartridge







SPGA = Staggered pin grid array







mPGA = Micro pin grid array







VRM = Voltage regulator module with variable voltage output determined by module type or manual jumpers







Auto VRM = Voltage regulator module with automatic voltage selection determined by processor Voltage ID (VID) pins