Pentium OverDrive
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The Pentium OverDrive was a marketing brand name used by Intel, to cover a variety of consumer upgrade products sold in the mid 1990s. It was originally released for 486 motherboards, and later some Pentium sockets. Intel dropped the brand, as it failed to appeal to corporate buyers, and discouraged new system sales.
OverDrive for 486 Sockets
The Pentium OverDrive was claimed to enable 486 owners to upgrade their machines to Pentium performance, without the cost of having to replace the entire system. However, unless the motherboard had a decent amount of high speed cache memory, performance was typically disappointing. Furthermore, the OverDrive chips ran hot, and it was pointed out the DX4 based upon an older chip architecture clocked to a higher frequency, typically ran faster. Third party upgrade chips based upon AMD 486 processors clocked to higher frequencies, offered superior performance and value.
PODP5V-63
- Introduced February 3, 1995
- 235 pins, P24T pinout
- 5 volts
- 63 MHz on 25 MHz front side bus (25 × 2.5)
PODP5V-83
- Introduced October, 1995
- 237 pins, P24T pinout
- 5 volts
- 83 MHz on 33 MHz front side bus (33 × 2.5)
OverDrive for Pentium Sockets
The original Pentium chips ran at higher voltages than later models, with a slower 60 or 66 MHz front side bus speed (socket 4, 5v). Although little known, Intel did in fact release an OverDrive chip for these sockets, that used an internal clock mutiplier of 2, to change them to a "120/133" machine.
OverDrives for the Pentium 75, 90 and 100 were also released (socket 5, 3.3v), running at 125, 150 and 166 MHz (clock multiplier of 2.5). The 125 is an oddity, because Intel never made a Pentium 125 as a stand-alone processor.
External link
- Intel® OverDrive® processors (http://support.intel.com/support/processors/overdrive)
- Intel Pentium OverDrive (http://www.pcguide.com/ref/cpu/fam/g5P54OD-c.html)
- Pictures of the 83MHz Pentium Overdrive (http://www.asahi-net.or.jp/~hn6h-kny/ODP83.htm)
- Intel 83MHz Pentium Overdrive (http://members.aol.com/liamproven/writing/reviews/components/P83.HTM)
- Intel Pentium OverDrive support page (http://www.intel.com/support/processors/overdrive/pentium/)
See also: Intel 80486 OverDrive
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