MSI H67MA-E35 User Manual download pdf (Page 38)

En-28

MS-7680 Mainboard

English

MS-7680 Mainboard

English

Adjusted DRAM Frequency

It shows the adjusted DRAM frequency. 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

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

congurations on the SPD. Selecting [Link] or [Unlink] allows users to congure the

DRAM timings and the following related “Advanced DRAM Conguration” sub-menu

manually.

Advanced DRAM Conguration

Press <Enter> to enter the sub-menu.

Command Rate

This setting controls the DRAM command rate.

tCL

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

before SDRAM starts a read command after receiving it.

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.

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, refreshing may be incomplete and DRAM may fail

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

system.

tRAS

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

tRFC

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

cell.

tWR

Minimum time interval between end of write data burst and the start of a precharge

command. Allows sense ampliers to restore data to cells.

tWTR

Minimum time interval between the end of write data burst and the start of a col-

umn-read command. It allows I/O gating to overdrive sense ampliers before read

command starts.

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MSI H67MA-E35 User Manual Page 38

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