User`s manual

VIA KT133 ATX MAINBOARD HARDWARE SETUP

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(B) JP8: CPU FRONT SIDE BUS SPEED SELECTION (optional)

AMD K7 CPU uses the DDR transfer technology on its data and address busses.

Simply speaking, there are two 100MHz clock inputs connected to the K7 CPU

and the CPU will use the DDR technology to generate the 200MHz front side

system bus speed. (scalable beyond 400MHz in the feature.) Beside the 100MHz

clock frequency for the CPU which you can find from the market, this mainboard

also has the 133MHz designed onboard to support the CPU which might be using

266MHz ( or possibly 533MHz) system bus frequency in the feature. If you find

JP8 on the board, you can use JP8 to select the front side bus speed between

100MHz and 133 MHz for different CPU. Please refer to the following for the

setting of JP8:

JP8

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JP8

Setting of JP8

SETTING SYSTEM BUS CLOCK SPEED

JP8 Open 200MHz (Default, Scalable up to 400MHz)

JP8 Short 266MHz (Scalable up to 533MHz)

Note : You can always refer to Section 4-11 and use the “ Clock By Slight

Adjust) selection field to fine tune the system bus frequency.