13
Step 3. Adjust the CPU Voltage
Jumper J2 is designed for users to set the proper voltage for the processor installed. A wrong
voltage setting will cause fatal damage to the CPU permanently.
There are total 7 different voltage selections in this XA100 motherboard to support full socket 7
processors that are avaialble today and in the near future.
If an Intel Pentium with MMX dual voltage processor is installed, please set to 2.8V.
If a AMD K6 with MMX dual voltage (166 and 200MHz) processor is installed please set to 2.9V.
If a AMD K6 with MMX dual voltage (233 and 266MHz) processor is installed please set to 3.2V.
If a AMD new generation K6 with MMX dual voltage (233 and 266MHz) processor is installed
please set to 2.2V.
If an Intel Pentium, AMD or Cyrix single voltage processor is installed please set to 3.5V.
2.7V and 1.8V are reserved for future use.
3.5
3.2
2.9
2.8
2.2
1.8 2.7
Step 4. Adjust the CPU Frequency
J1 is a 2x12-pin jumper. The upper four blocks of J1 are for processor External Frequency selection,
and the others are used to select processor’s Multiplier. This motherboard supports four External
Frequency: 66 MHz, 75 MHz, 83 MHz and 100 MHz. Regarding the External Frequency and
Multiplier for different processors, please refer to the following table.
