Editing Pentium Pro (section)

==Upgrade paths==
In 1998, the 300/333&nbsp;MHz [[Pentium OverDrive#Socket 8|Pentium II OverDrive]] processor for Socket&nbsp;8 was released. Based on some of the technology used in the ''Deschutes'' [[Pentium II Xeon]], it featured double L1 and 512&nbsp;KB of full-speed L2 cache with [[MMX (instruction set)|MMX]] capabilities, and was produced by Intel as a drop-in upgrade option for owners of Pentium Pro systems. However, it only supported two-way [[glueless]] multiprocessing and not four-way or higher, which did not make it a usable upgrade for quad-processor systems. Despite this, some users have unofficially upgraded their quad- and even hexa-processor systems (especially the ALR 6x6) with varying degrees of success.<ref>{{Cite web|url=https://arstechnica.com/civis/threads/re-my-custom-alr-6x6-is-now-finished.878654/|title=Re: My Custom ALR 6x6 is now FINISHED!!!!!!|date=December 5, 2001|website=Ars OpenForum|access-date=April 13, 2025}}</ref>

The ASCI Red supercomputer also utilized these specially packaged Pentium II OverDrive processors in 1999 to make it the first computer overall to exceed the two teraFLOPS performance mark that year, further maintaining its position on the TOP500 list until it was surpassed by the [[ASCI White]] supercomputer in 2000. The original dual Pentium Pro processors used since its inception in 1996 were replaced with dual Pentium II OverDrive processors on each computing node. ASCI Red then continued to use dual Pentium II OverDrive processors for the remainder of its lifespan before being decommissioned in 2006.

As [[Slot 1]] motherboards became prevalent, several manufacturers released [[slotket]] (or slocket) adapters in the form of [[Socket 8]] to Slot 1 adapters, which includes the Tyan M2020, Asus C-P6S1, Tekram P6SL1, and the Abit KP6. These slotkets allowed Pentium Pro processors to be used with Slot&nbsp;1 motherboards, however only a few number of chipsets supported these slotkets and so did not see widespread use. For instance, the [[Intel 440FX]] chipset explicitly supported both Pentium Pro and Pentium II processors but the [[Intel 440BX]] and later Slot&nbsp;1 chipsets only explicitly supported the Pentium II and not the Pentium Pro.

Slotkets eventually saw renewed popularity in the form of [[Socket 370]] to Slot&nbsp;1 adapters, when Intel introduced Socket&nbsp;370 [[Celeron]] and [[Pentium III]] processors in the late 1990s. These form of slotkets allowed for lower costs for computer builders, especially with dual-processor machines, and gave Slot 1 motherboards the ability to continue receiving CPU upgrades beyond the then-currently available Slot 1 CPUs. They also came equipped with their own voltage regulator modules, in order to supply the new CPU with a lower core voltage, which the motherboard would not otherwise allow.