SOYO 6KM Series User's Manual & Technical Reference page 31

BIOS Setup
CPU Frequency:
2.0 100MHz
2.5 125MHa
CPU 3.0 150MHz
Ratio 3.5 175MHz
4.0 200MHz
4.5 225MHz
5.0 250MHz
Notes: If you use Bus Frequencies of 75MHz, make sure that your PCI
cards can cope with the higher PCI clock.
3. After you have finished with the Chipset Features Setup, press the
<ESC> key and follow the screen instructions to save or disregard
your settings.
50MHz 60MHz
120MHz
150MHz
180MHz
210MHz
240MHz
270MHz
300MHz
Bus Frequency
66MHz 68MHz
133MHz 137MHz
166MHz 171MHz
200MHz 205MHz
233MHz 239MHz
(default)
266MHz 274MHz
300MHz 308MHz
333MHz 342MHz
27
75MHz
150MHz
188MHz
225MHz
263MHz
300MHz
338MHz
375MHz