Via EPIA-SP8000E User Manual - Page 83

ACT0 to ACT1 TRRD, Spread Spectrum

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BIOS Setup ACT(0) to ACT(1) (TRRD) This field is only available when "DRAM Timing" is set to "Manual". Settings: [2T, 3T] 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. 75

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BIOS Setup
75
ACT(0) to ACT(1) (TRRD)
This field is only available when “DRAM Timing” is set to “Manual”.
Settings: [2T, 3T]
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.