System Description; Programmable Crystal Oscillator - American Megatrends Apollo User Manual

System Description

CPU Type The Apollo Pentium PCI motherboard supports a 90, 100, 120, or 133 MHz Intel Pentium CPU in a single
320-pin ZIF socket.
The Apollo Pentium PCI motherboard includes Socket 5 support. The CPU speed is selected through jumper
settings. CPU voltages are supported through a built-in voltage regulator.
Programmable Crystal Oscillator The Apollo motherboard has a programmable crystal oscillator that supports all possible
motherboard frequencies.
Supported CPU Voltages This motherboard supports standard, VR, and VRE voltages. Voltages are selected through jumper
settings.
CPU Cooling A heat sink or a heat sink and fan are required for every Pentium CPU. If the motherboard is shipped with a
100 MHz, 120 MHz, or 133 MHz CPU, the heat sink and cooling fan are supplied with the motherboard.
If you are installing the CPU, you must make sure that adequate cooling is provided. See
2
CPU Type CPU Speed
P54C 100 MHz
P54C 100 MHz
P54C 90 MHz
P54CS 120 MHz
P54CS 133 MHz
Important
the CPU manufacturer's instructions.
Apollo Motherboard User's Guide
Host Clock Rate PCI Clock Rate
50 MHz
66 MHz 33.33 MHz
60 MHz
60 MHz
66.66 MHz 33.33 MHz
25 MHz
30 MHz
30 MHz
Cont'd