Overclocking the Intel Pentium Pro

The Intel Pentium Pro still doesn't seem to be a popular CPU for overclocking. This is really not fair to the powerful Pentium Pro since this CPU works just as well as the Pentium for overclocking.
The first letdown seems to be the lack of any available motherboard for this CPU that runs at a 75 or 83 MHz bus speed. Hence you'll have to stick to the good old 50, 60 and 66 MHz settings. For the Pentium Pro the same methods are valid as for the Pentium - first try improving your bus speed.
A Pentium Pro150 or a 180 doesn't deserve to run at the puny bus speed of 50 or 60 MHz. They are screaming to be overclocked to the 66 MHz bus speed and will reward you with a considerable performance increase and a high reliability.

Default settings for Pentium Pro

Pentium Pro at	1st choice	2nd choice
150 MHz	166 MHz @ 2.5 x 66 MHz	-
180 MHz	233 MHz @ 3.5 x 66 MHz	200 MHz @ 3 x 66 MHz
200 MHz	266 MHz @ 4 x 66 MHz	233 MHz @ 3.5 x 66 MHz

I admit, that it will be tough, to get a Pentium Pro 180 to 233 MHz and a Pentium Pro 200 to 266 MHz, but it's worth a try. The second choices however work out in most of the cases and the Pentium Pro 150 runs great at 166 MHz. The problem with the Pentium Pro is the difficulty to adjust things. Here the SoftMenuTM technology is a let down, because it wouldn't let you choose 233 or 266 MHz. You can't adjust the voltage either, because the motherboards adjusts it by itself or more by a VRM module. Nevertheless the Pentium Pro is a worthy overclockable CPU!