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Pentium Overdrive

The Pentium Overdrive (code-name P24T) was an Intel Pentium processor for 486 Socket 3[?] and Socket 2[?] PC motherboards. Pentium Overdrives were unlike 'normal' Pentium processors, which were designed to function with a fast 66 MHz or 60 MHz front side bus (apart from the 75 MHz version) as well as cpu sockets which did not appear on 486 motherboards. The Pentium Overdrive was provided as a means to give a Pentium-performance-level upgrade option for owners of 486 computer systems. It was however, criticised for being more expensive and slower than competing CPU-upgrade options such as the AMD Am5x86 and Cyrix Cx5x86, and being too late to the market.

To perform properly, the chips were dependent on sizable amounts of cache ram[?] being present on the motherboard; without it the Pentium Overdrive was only a trivial amount faster than a DX4.

Two models were sold:


  • Introduced February 3rd, 1995
  • 235 pins, P24T pinout
  • 5 volts
  • 63 MHz on 25 MHz front side bus (25 × 2.5)


  • Introduced October, 1995
  • 237 pins, P24T pinout
  • 5 volts
  • 83 MHz on 33 MHz front side bus (33 × 2.5)

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