Jetway Computer J7F2 - Manual (Page 41)

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CPU Clock Ratio
This item allows you to select the CPU ratio.
Auto Detect PCI/DIMM Clock
This item allows you to enable/disable auto detect PCI/DIMM Clock.
The settings are: Enabled, Disabled.
Spread Spectrum
This item allows you to set the Spread Spectrum.
Host/PCI Clock at Next Boot is
This item allows you to select the CPU/PCI Clock.
By press PageDown/PageUp key you can change the CPU Host/PCI Clock
When jumper setting CPU Host Clock 66MHz you can choose 66/33
∼99/49MHz
When jumper setting CPU Host Clock 100MHz you can choose 100/33
∼132/44MHz
When jumper setting CPU Host Clock 133MHz you can choose 133/33
∼200/50MHz