MSI Big Bang-XPower User Manual download pdf (Page 54)

En-44

MS-7666 Mainboard

Base Clock Button

This item is used to enable/ disable the base clock button function.

MEMORY-Z

Press <Enter> to enter the sub-menu.

DIMM1~6 Memory SPD Information

Press <Enter> to enter the sub-menu. The sub-menu displays the informations of

installed memory.

Current DRAM Channel1/2/3 Timing

It shows the installed DRAM Timing. Read-only.

DRAM Timing Mode

Select whether DRAM timing is controlled by the SPD (Serial Presence Detect) EE-

PROM on the DRAM module. Setting to [Auto] enables DRAM timings and the following

“Advance DRAM Conguration” sub-menu to be determined by BIOS based on the con-

gurations on the SPD. Selecting [Manual] allows users to congure the DRAM timings

and the following related “Advance DRAM Conguration” sub-menu manually.

Advance DRAM Conguration

Press <Enter> to enter the sub-menu.

CH1/ CH2/ CH3 or CH1-3 1T/2T Memory Timing

This item controls the SDRAM command rate. Selecting [1] makes SDRAM signal

controller to run at 1N (N=clock cycles) rate. Selecting [2] makes SDRAM signal

controller run at 2N rate.

CH1/ CH2/ CH3 or CH1-3 CAS Latency (CL)

This controls the CAS latency, which determines the timing delay (in clock cycles)

before SDRAM starts a read command after receiving it.

CH1/ CH2/ CH3 or CH1-3 tRCD

When DRAM is refreshed, both rows and columns are addressed separately. This

setup item allows you to determine the timing of the transition from RAS (row ad-

dress strobe) to CAS (column address strobe). The less the clock cycles, the faster

the DRAM performance.

CH1/ CH2/ CH3 or CH1-3 tRP

This setting controls the number of cycles for Row Address Strobe (RAS) to be

allowed to precharge. If insucient time is allowed for the RAS to accumulate its

charge before DRAM refresh, refresh may be incomplete and DRAM may fail to

retain data. This item applies only when synchronous DRAM is installed in the sys-

tem.

CH1/ CH2/ CH3 or CH1-3 tRAS

This setting determines the time RAS takes to read from and write to memory cell.

CH1/ CH2/ CH3 or CH1-3 tRFC

This setting determines the time RFC takes to read from and write to a memory

cell.

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MSI Big Bang-XPower User Manual Page 54

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