User Guide

Hardware Installation
2-9
Cyrix 6x86 CPU Core
Frequency
Ratio External
Bus
Clock
JP1 & JP2 JP3 & JP4 JP13
P120+ 100MHz 2x 50MHz 1-2 & 1-2 2-3 & 2-3 1-2 & 5-6
P150+ 120MHz = 2x 60MHz 2-3 & 1-2 1-2 & 2-3 1-2 & 3-4
P166+ 133MHz = 2x 66MHz 2-3 & 1-2 2-3 & 1-2 3-4
AMD K5 CPU Core
Frequency
Ratio External
Bus
Clock
JP1 & JP2 JP3 & JP4 JP13
PR90 90MHz = 1.5x 60MHz 1-2 & 1-2 1-2 & 2-3 1-2 & 3-4
PR100 100MHz = 1.5x 66MHz 1-2 & 1-2 2-3 & 1-2 3-4
PR120 90MHz = 1.5x 60MHz 1-2 & 1-2 1-2 & 2-3 1-2 & 3-4
PR133 100MHz = 1.5x 66MHz 1-2 & 1-2 2-3 & 1-2 3-4
PR166 116MHz = 1.75x 66MHz 2-3 & 2-3 2-3 & 1-2 3-4
AMD K6 CPU Core
Frequency
Ratio External
Bus
Clock
JP1 & JP2 JP3 & JP4 JP13
PR166 166MHz = 2.5x 66MHz 2-3 & 2-3 2-3 & 1-2 3-4
PR200 200MHz = 3x 66MHz 1-2 & 2-3 2-3 & 1-2 3-4
Note: Cyrix 6x86 and AMD K5 CPU use P-rating
for the reference of CPU benchmark compared
with INTEL P54C, their internal core frequency is
not exactly equal to P-rating marked on the CPU.
For example, Cyrix P166+ is 133MHz but
performance is almost equal to P54C 166MHz
and AMD PR133 is 100MHz but performance is
almost equal to INTEL P54C 133MHz.
2.2.3 Disabling the Onboard Super I/O Controller
JP18
1-2
2-3
Onboard Super I/O
Enable (default)
Disable
The board is default to enable the onboard
Super I/O controller. In case you wish to use
an external I/O control card, you need to
disable the onboard I/O before using the
external I/O card. To disable it, set the jumper
JP18 to 2-3.