Via EPIA-EK10000G User Manual - Page 69

REF to ACT / REF Trfc, ACT0 to ACT1 TRRD, DRAM Command Rate, Spread Spectrum Range, Spread Spectrum

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REF to ACT / REF (Trfc) This field is only available when "DRAM Timing" is set to "Manual". Settings: [12T, 13T, 14T, 15T] BIOS Setup ACT(0) to ACT(1) (TRRD) This field is only available when "DRAM Timing" is set to "Manual". Settings: [2T, 3T] 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] Spread Spectrum Range Settings: [+/- 0.1%, +/- 0.2%, +/- 0.3%, +/- 0.6%] 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, Enabled] 61

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BIOS Setup
61
REF to ACT / REF (Trfc)
This field is only available when “DRAM Timing” is set to “Manual”.
Settings: [12T, 13T, 14T, 15T]
ACT(0) to ACT(1) (TRRD)
This field is only available when “DRAM Timing” is set to “Manual”.
Settings: [2T, 3T]
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]
Spread Spectrum Range
Settings: [+/- 0.1%, +/- 0.2%, +/- 0.3%, +/- 0.6%]
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, Enabled]