- Mendocino (300 MHz - 533 MHz)
- Coppermine (533 - 1100 MHz)
- Tualatin (900 - 1400 MHz)
Intel Pentium III
- Coppermine (500 - 1133 MHz)
- Tualatin (1000 - 1400 MHz)
VIA Cyrix III / VIA C3 ( 500-1200 MHz)
The base 370 is a processor socket for Celeron and Pentium III processors, as well as pin and protocol compatible processors the Cyrix III and VIA C3 series of.
There are three different versions of the base 370:
- For the Mendocino Celerons Series in PPGA package
- For the Pentium III and Celeron Coppermine series
- For the Pentium III and Celeron Tualatin the series
These different versions were conditionally backward compatible but not forward compatible:
- In a socket 370 motherboard of the first generation only Medocino Celerons were working in PPGA package.
- In a socket 370 motherboard second-generation Pentium III and Celeron CPUs worked with Coppermine core, often the older Mendocino Celerons in the PPGA package.
- In a socket 370 motherboard third-generation Pentium III and Celeron CPUs worked with Tualatin core, often CPUs with Coppermine core. The use of a PPGA Celeron was no longer possible.
Cause of incompatibilities are changes to the power supply and the signal levels of the bus protocol or individual signals. However, it is rumored in particular in the third socket 370 generation also from a " deliberate " incompatibility, as the Intel Pentium III long term would be phased out in favor of the Pentium 4 and the Celeron and Pentium III CPUs, the Tualatin - series only for OEM, server and mobile market were provided and were no longer actively marketed.
The base 370 was replaced by Socket 423 for Pentium 4.