VIA Technologies EPIA-EK, User Manual

Page: 69 / 79

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]