Author Topic: intel dx2-66Mhz Overdrive (Jun 1993 - Nov 1994)  (Read 1090 times)

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Offline chrisNova777

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intel dx2-66Mhz Overdrive (Jun 1993 - Nov 1994)
« on: September 18, 2017, 02:11:28 PM »

Processor Speed:
66.00 MHz
Bus Speed:
33.00 MHz
L1 Cache: 8 kByte
FPU: yes
Mfg. date:
  week 48/1994

Intel's i486 OverDrive processors are a category of various Intel 80486s that were produced with the designated purpose of being used to upgrade personal computers. The OverDrives typically possessed qualities different from 'standard' i486s with the same speed steppings. Those included built-in voltage regulators, different pin-outs, write-back cache instead of write-through cache, built-in heatsinks, 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 2 versions, ODP and ODPR variants. 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).
Overdrive/upgrade processors for 80486 systems could be used to easily upgrade single or double clocked 80486 processors with double or triple clocked 80486 CPUs. Two different types of 80486 overdrive processors were offered:
Processors with "ODP" in their part number could only be used in special overdrive sockets. When inserted into the overdrive socket they would disable the original processor.
Processors with "ODPR" in their part number replaced the original processor.
Almost all overdrive processors were sold with integrated heatsink.