Microstar G41M manual Bios Setup TWR, Trrd, Twtr, FSB/Memory Ratio, Adjusted Dram Frequency MHz

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 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 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

When 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

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.

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