Intel

CPU Pentium Pentium Pro Pentium 2 Celeron Pentium 3 Pentium 4 Xeon
Package PGA SPGA SEC SEP, PGA, SEC SEC, PGA PGA SEC, PGA
Sockets Socket 4
Socket 5
Socket 7 		Socket 8 Slot 1 Slot 1
Socket 370
Socket 478 		Slot 1
Socket 370 		Socket 423
Socket 478 		Slot 2
Socket 603
Pins 273
320
296 or 321 		387 242 242
370
478 		242
370 		423
478
 330
603

AMD

CPU K5 K6 Athlon Duron Thunderbird Athlon XP
Package PGA PGA SEC PGA PGA PGA
Sockets Socket 5
Socket 7 		Socket 7 Slot A Socket A Socket A Socket A
Pins 320
296 or 321 		296 or 321 242 462 462 462