Via EPIA-EN12000EG User Manual - Page 75

Write to Read CMD Twtr

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ACT(0) to ACT(1) (TRRD) This field is only available when "DRAM Timing" is set to "Manual". Settings: [2T, 3T, 4T, 5T] BIOS Setup Read to Precharge (Trptp) Settings: [2T, 3T] Write to Read CMD (Twtr) Settings: [1T/2T, 2T/3T] 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. Settings: [2T Command, 1T Command] Note: Some memory modules may not be able to handle lower settings. RDSAIT Mode Settings: [Manual, Auto] RDSAIT Selection Key in a HEX number. Settings: [Min = 0000, Max = 003F] Auto Detect PCI Clk Settings: [Disabled, Enabled] 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. 67

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BIOS Setup
67
ACT(0) to ACT(1) (TRRD)
This field is only available when “DRAM Timing” is set to “Manual”.
Settings: [2T, 3T, 4T, 5T]
Read to Precharge (Trptp)
Settings: [2T, 3T]
Write to Read CMD (Twtr)
Settings: [1T/2T, 2T/3T]
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.
Settings: [2T Command, 1T Command]
Note:
Some memory modules may not be able to handle lower settings.
RDSAIT Mode
Settings: [Manual, Auto]
RDSAIT Selection
Key in a HEX number.
Settings: [Min = 0000, Max = 003F]
Auto Detect PCI Clk
Settings: [Disabled, Enabled]
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.