Socket 370 / Socket PGA370
Socket 370 (also called PGA370) is a PGA socket designed to work with Intel
Celeron and Pentium III processors in Pin Grid Array (PGA) package. There are
three different revisions of the socket 370:
- Originally the Socket 370 (PGA370) was designed for
Celeron Mendocino CPUs.
These processors were manufactured in plastic PGA (PPGA) package,
ran at speeds 300 MHz - 533 MHz, and had 66 MHz front-side bus
and 2V core voltage. Original Socket 370 is not compatible with
Coppermine and Tualatin Intel processors. It is possible to run Coppermine
processors in this socket with the help of special PPGA-to-FC-PGA adapters,
for example, PowerLeap PL-NeoS370.
- To support newer
and Pentium III processors
Intel revised specifications for the socket 370. The revised socket was
mechanically compatible with the original specification, but there were differences in
electrical specifications. As a result, new
Coppermine CPUs would not work in the original socket, even though they
would fit into it. Revised Socket 370 supported Coppermine processors
running at speeds 533 MHz - 1133 MHz with FSB 100 and 133 MHz and core
voltages in the range from 1.5V to 1.8V. Tualatin Pentium III processors were
not directly supported by the socket, though it was possible to run them
in the socket with the help of Tualatin adapters (for example, PowerLeap
Neo/T). Many motherboards with this PGA370 socket revision also supported
Celeron processors in PPGA package.
- With the introduction of new Tualatin Pentium III core the socket
370 was revised once again. Like the previous revision of the socket,
the second revision was mechanically compatible with old sockets, but
electrically incompatible with previous socket revisions. This socket revision
supported Tualatin processors in the range from 1 GHz to 1.4 GHz
with FSB 100 and 133 MHz and core voltages 1.45V and 1.5V.
Majority of motherboards with this revision of the socket 370 were
also compatible with older Coppermine Pentium III and Celeron processors.
Visually it's not possible to distinguish between different revisions of the socket 370 (PGA370),
they all look like the socket on the picture below:
The socket has 370 pin-holes - hence the name Socket 370, and it has
the same size as the Socket 7. There are two differences between these sockets:
- Socket 370 processors don't have 2 corner pins while Socket 7
processors don't have only one corner pin. The extra corner pin
doesn't allow Socket 7 processors to fit into PGA370 socket.
- There are 6 rows of pins between the edge and the center of the processor for
Socket 370 processors, and 5 rows for Socket 7 processors.
Celeron (Mendocino) (300 MHz - 533 MHz), the fastest Celeron PPGA is Celeron 533
Celeron (Coppermine) (533 MHz - 1100 MHz)
Celeron (Tualatin) (900 MHz - 1500 MHz)
Pentium III (Coppermine) (500 MHz - 1133 MHz)
Pentium III (Coppermine-T) (800 MHz - 1133 MHz)
Pentium III (Tualatin) (800 MHz - 1400 MHz)
VIA C3 (FC-PGA) (466 MHz - 1000 MHz)
Socket 7 processors are not compatible with Socket 370 and they do not fit into the socket.
There are no AMD processors compatible with this socket.
Compatible package types
370-pin Plastic Pin Grid Array (PPGA)
370-pin Flip-Chip Pin Grid Array (FC-PGA)
370-pin Flip-Chip Pin Grid Array with integrated heatspreader (FC-PGA2)
For processor installation instructions please look at your motherboard
manual, or follow
installation instructions on Intel website.