V1.0 Vig625M Motherboard Manual
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This delay is required to guarantee that data in the write buffers can be written to
the memory cells before precharge occurs.
tRRD
When the DRAM Timing Mode sets to [Manual], the field is adjustable. Specifies
the active-to-active delay of different banks.
tWTR
When the DRAM Timing Mode is set to [Manual], the field is adjustable. This item
controls the Write Data In to Read Command Delay memory timing. This
constitutes the minimum number of clock cycles that must occur between the last
valid write operation and the next read command to the same internal bank of the
DD R device.
FSB/DRAM Ratio
This item will allow you to adjust the ratio of FSB to memory.
Adjusted DRAM Frequency (MHz)
It shows the adjusted memory frequency. Read-only.
Adjust PCI-E Frequency (MHz)
This item allows you to adjust the PCI-E frequency.
Auto Disable DRAM/PCI Frequency
When set to [Enabled], the system will remove (turn off) clocks from empty DIMM and
PCI slots to minimize the electromagnetic interference (EMI).
Spread Spectrum
When the motherboard‟s clock generator pulses, the extreme values (spikes) of the
pulses create 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. If you do not have any EMI problem, leave the setting at
Disabled for optimal system stability and performance. But if you are plagued by EMI,
set to Enabled for EMI reduction. Remember to disable Spread Spectrum if you are
overclocking because even a slight jitter can introduce a temporary boost in clock
speed which may just cause your overclocked processor to lock up.
IMPORTANT!
If you do not have any EMI problem, leave the setting at [Disabled] for optimal system
stability and performance. But if you are plagued by EMI, select the value of Spread
Spectrum for EMI reduction.
The greater the Spread Spectrum value is, the greater the EMI is reduced, and the
system will become less stable. For the most suitable Spread Spectrum value, please
consult your local EMI regulation.
Remember to disable Spread Spectrum if you are overclocking because even a slight
jitter can introduce a temporary boost in clock speed which may just cause your
overclocked processor to lock up.
