CPU Socket

CPU Socket

A CPU socket is a connector built into the motherboard where the CPU (central processing unit) goes. Most motherboards use the PGA (Pin Grid Array) architecture which means that there is a grid of holes, in which a particular CPU’s pins will fit into.

The majority of CPUs also have a latch. This means that the CPU slides in easily and then it grips the pins tightly when the latch is placed down. Several of the recent LGA (land grid array) motherboards now have pins in the socket while the CPU has contact pads that match the pins.

A computer motherboard connects with the CPU and forms an electrical interface with it. There are many different sockets so it is important when purchasing a motherboard and CPU to make sure that the CPU will fit inside the socket.


CPU Sockets
SocketPin CountCPU FamiliesFrequency Mhz)BusFrequency (Mhz)
Slot 1242Intel Celeron, Pentium II,Pentium III233-113366-133
Socket 7321AMD K5 / K6 / K6-2 / K6-III
Cyrix 6×86, 6x86L, 6x86MX, MII
Intel Pentium, Pentium MMX
75-57050-100
Socket 370370Intel Celeron, Pentium III
VIA C3
300-140066-133
Socket 462 / Socket A462AMD Duron, Sempron,Athlon, Athlon XP, Athlon MP, Mobile Duron, Mobile Athlon, Athlon 4,Athlon XP-M550-3200200-400
Socket 423423Intel Pentium 41300-2000400
Socket 478478Intel Celeron, Celeron D,Pentium 4, Mobile Pentium 4-M, Mobile Pentium 41400-3466400-800
Socket 775775Intel Celeron D, PentiumDual-Core, Pentium 4, Pentium 4 Extreme Edition, Pentium D, Core 2 Duo,Core 2 Quad, Core 2 Extreme1600-3800533-1333
Socket 939939AMD Sempron, Athlon 64,Athlon 64 X2, Athlon 64 FX, Opteron, Dual-Core Opteron1800-3000


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