VIA Technologies NAB-7400 User Manual page 60

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Chapter 3
Write Recovery Time (Twr)
Settings: [2T, 3T, 4T, 5T]
DRAM Command Rate
This field is for setting how fast the memory controller sends out commands.
Lower setting equals faster command rate.
Note: Some memory modules may not be able to handle lower
settings.
Settings: [2T Command, 1T Command]
RDSAIT mode
Settings: [Manual, Auto]
Auto Detect PCI Clk
Settings: [Enabled, Disabled]
CPU Clock
Settings: [Key in a DEC number ranged between 100~333]
CPU Clock Ratio
To configure the CPU internal clock multiplier. This option does NOT apply to
CPU(s) which have this clock multiplier locked.
Settings: [Key in a DEC number ranged between 8~50]
Spread Spectrum
When the mainboard's clock generator pulses, the extreme values (spikes) of
the pulses creates EMI (Electromagnetic Interference). The Spread Spectrum
function reduces the EMI generated by modulating the pulses so that the
spikes of the pulses are reduced to flatter curves.
Settings: [Disabled, 0.20%, 0.25%, 0.35%]
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