Microstar G41M - Manual (Page 57)

3-21
BIOS Setup
tWR
W hen the Configure DRAM Timing by SPD sets to [Manual], the field is
adjustable. It specifies the amount of delay (in clock cycles) that must elapse
after the completion of a valid write operation, before an active bank can be
precharged. This delay is required to guarantee that data in the write buffers
can be written to the memory cells before precharge occurs.
tRRD
W hen the Configure DRAM Timing by SPD sets to [Manual], the field is
adjustable. Specifies the active-to-active delay of different banks.
tWTR
W hen the Configure DRAM Timing by SPD sets to [Manual], the field is
adjustable. This item controls the W rite 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 DDR device.
FSB/Memory Ratio
This item will allow you to adjust the FSB/Ratio of the memory.
Adjusted DRAM Frequency (MHz)
It shows the adjusted DDR Memory frequency. Read-only.
Adjust PCI-E Frequency (MHz)
This field allows you to select the PCIE frequency (in MHz).
Auto Disable DIMM/PCI Frequency
W hen set to [Enabled], the system will remove (turn off) clocks from empty DIMM and
PCI slots to minimize the electromagnetic interference (EMI).
CPU Voltage(V)/ CPU GTL REF(V)/ Memory Voltage(V)/ Momory REF(V)/ NB
Voltage(V)/ VTT FSB Voltage(V)
These items are used to asjust the voltage of CPU, Memory and chipset.
Spread Spectrum
W hen 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.
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