Pentium OverDrive

The Pentium OverDrive was a microprocessor marketing brand name used by Intel, to cover a variety of consumer upgrade products sold in the mid-1990s.

[2] The processor's heatsink is permanently attached, and the removable fan module is powered via spring-like metal prongs that connect to a trio of conductors on the surface of the chip.

Although little known, Intel did in fact release an OverDrive chip for these sockets, that used an internal clock multiplier of 2, to change them to a "120/133" machine.

This combination would be replicated by the later "Dixon" mobile Pentium II core with 256 kB of full-speed cache embedded on-die.

"[6] The major customer for these chips was Intel's ASCI Red supercomputer, stationed at Sandia National Laboratories.

It was the first computer to break the teraFLOPS performance mark in late 1996, which up until the upgrade was running dual Pentium Pro CPUs in its nodes since its inception.

ASCI Red had all 4,510 CPUs upgraded from dual Pentium Pros to dual Pentium II Overdrives in 1999, making it the first computer to break over two teraFLOPS after the upgrade while maintaining its position as the world's fastest on the TOP500 list at the time as it continues to hold that position from its first full operations in 1997 up until late 2000.

ASCI Red continued to use dual Pentium II OverDrive CPUs for the remainder of its usage until it was finally decommissioned in 2006.