Apollo III PCI Pentium ISA Motherboard User’s Guide
10
Step 2 Configure CPU

Important

Perform the following steps to configure the

motherboard before installing a CPU.

External and Internal CPU Clock CLK1, CLK2, FREQ1, and FREQ2 are 3-pin bergs that set

the CPU external and internal clock frequencies. FREQ1 and FREQ2 are next

to the CPU. CLK1 and CLK2 are towards the middle of the motherboard.

External Internal CLK1 CLK2 FREQ1 FREQ2
66 MHz 166 MHz Short Pins
1-2 Short Pins
2-3 Short Pins
2-3 Short Pins
2-3
60 MHz 150 MHz Short Pins
2-3 Short Pins
1-2 Short Pins
2-3 Short Pins
2-3
66 MHz 133 MHz Short Pins
1-2 Short Pins
2-3 Short Pins
2-3 Short Pins
1-2
60 MHz 120 MHz Short Pins
2-3 Short Pins
1-2 Short Pins
2-3 Short Pins
1-2
66 MHz 100 MHz Short Pins
1-2 Short Pins
2-3 Short Pins
1-2 Short Pins
1-2
60 MHz 90 MHz Short Pins
2-3 Short Pins
1-2 Short Pins
1-2 Short Pins
1-2
50 MHz 75 MHz Short Pins
2-3 Short Pins
2-3 Short Pins
1-2 Short Pins
1-2
60 MHz 180 MHz Short Pins
2-3 Short Pins
1-2 Short Pins
1-2 Short Pins
2-3
66 MHz 200 MHz Short Pins
1-2 Short Pins
2-3 Short Pins
1-2 Short Pins
2-3

Important

Please contact American Megatrends technical

support at 770-246-8645 if you need to support a

CPU running at a higher speed.

Cont’d