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.

(2000-08-26)