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PB 790/795 CPU Upgrade Information

Caution Only authorized service personnel should upgrade the system. Anyone who wants to upgrade the system herself/himself should know about the dangers of ESD (Electro-Static Discharge) and the necessary precautions. Unknowingly zapping the components of the computer will void the warranty.

Note:
This motherboard can accommodate the following CPUs:

Intel MMX Pentium 166 MHz Intel MMX Pentium 233 MHz
Intel MMX Pentium 200 MHz

This motherboard can also accommodate the following non-MMX CPUs:

Intel Pentium 90 MHz Intel Pentium 150 MHz
Intel Pentium 100 MHz Intel Pentium 166 MHz
Intel Pentium 120 MHz Intel Pentium 200 MHz
Intel Pentium 133 MHz

Zero Insertion Force (ZIF) socket
Uses the 321-pin Type 7 CPU Socket
Not keyboard switchable.
Disable cache to slow down the system.

There are no separate or additional jumpering requirements for the Pentium processors with MMX technology.

CPU Speed Jumper Settings
Processor Freq. (MHz) Jumpers J9C1-C Jumpers J9C1-D Host Bus
Freq. (MHz)
Bus/Processor Freq. Ratio
233 5-6 1-2 & 4-5 66 3.5
200 5-6 1-2 & 5-6 66 3.0
166 5-6 2-3 & 5-6 66 2.5
150 4-5 2-3 & 5-6 60 2.5
133 5-6 2-3 & 4-5 66 2.0
120 4-5 2-3 & 4-5 60 2.0
100 5-6 1-2 & 4-5 66 1.5
90 4-5 1-2 & 4-5 60 1.5

Document Information
04082022