i486 OverDrive

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, and fanless operation — features that made them more able to work where an ordinary edition of a particular model would not.

Each 486 Overdrive typically came in two versions, ODP and ODPR variants.^[1] The ODPR chips had 168 pins and functioned as complete swap-out replacements for existing chips, whereas the ODP chips had an extra 169th pin, and were used for inserting into a special 'Overdrive' (Socket 1) socket on some 486 boards, which would disable the existing CPU without needing to remove it (in case that the existing CPU is surface-mounted). ODP chips will not work in Pre-Socket 1 486 boards due to the extra pin. The ODP and ODPR labeling can be found in the CPU's model number(i.e.: DX2ODPR66).

Models

Models available included:

• 20 MHz FSB, 40 MHz core
• 25 MHz FSB, 50 MHz core
• 33 MHz FSB, 66 MHz core
• 25 MHz FSB, 75 MHz core
• 33 MHz FSB, 100 MHz core

Two P54 core Pentium-based CPUs were released for 238-pin Socket 2/Socket 3-based systems, for more information, see Pentium OverDrive

See also

• RapidCAD

References