Socket 370

<hardware, standard, processor> (PGA370) A physical and electrical specification for a motherboard processor socket.

Socket 370 uses a square SPGA ZIF socket with 370 pins, arranged 37x37 (sometimes described as 19x19).

Intel originally designed Socket 370 for PPGA Celeron processors.

Newer Socket 370 motherboards additionally support FC-PGA Celeron and Pentium III processors.

The difference between the two versions is electrical; some pins are used differently and voltage requirements have been changed from Intel's VRM 8.2 to VRM 8.4.

In addition, Celeron processors require a 66 MHz front side bus (FSB), and Pentium III processors require a 100/133 MHz FSB.

Some older Socket 370 motherboards support VRM 8.4 and variable bus speeds, so adapters are available that convert the socket pinout to allow FC-PGA processors to work.

VIA's Cyrix III processor was designed to work with Socket 370 motherboards.

Intel Celeron Processor in PPGA form factor - Integration (

Pentium III Processors - Design Guidelines (

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social science number
Socket 1
Socket 2
Socket 3
Flip Chip Pin Grid Array
front side bus
Packet in Plastic Grid Array
Plastic Pin Grid Array
Socket 4
Socket 5
Socket 6
Socket 7
Socket 8