MSI H67MA-E35-B3 User Manual download pdf (Page 38)

En-28

MS-7680 Manboard

DRAM Rato

Ths settng controls the rato of memory frequency to enable the memory to run at df

ferent frequency combnatons.

Adjusted DRAM Frequency

It shows the adjusted DRAM frequency. Read-only.

DRAM Tmng Mode

Select whether DRAM tmng s controlled by the SPD (Seral Presence Detect) EE

PROM on the DRAM module. Settng to [Auto] enables DRAM tmngs and the followng

“Advanced DRAM Conguraton” sub-menu to be determned by BIOS based on the

conguratons on the SPD. Selectng [Lnk] or [Unlnk] allows users to congure the

DRAM tmngs and the followng related “Advanced DRAM Conguraton” sub-menu

manually.

Advanced DRAM Conguraton

Press <Enter> to enter the sub-menu.

Command Rate

Ths settng controls the DRAM command rate.

tCL

Ths controls the CAS latency, whch determnes the tmng delay (n clock cycles)

before SDRAM starts a read command after recevng t.

tRCD

When DRAM s refreshed, both rows and columns are addressed separately. Ths

setup tem allows you to determne the tmng of the transton from RAS (row ad

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

the DRAM performance.

tRP

Ths settng controls the number of cycles for Row Address Strobe (RAS) to be

allowed to precharge. If nsucent tme s allowed for the RAS to accumulate ts

charge before DRAM refresh, refreshng may be ncomplete and DRAM may fal

to retan data. Ths tem apples only when synchronous DRAM s nstalled n the

system.

tRAS

Ths settng determnes the tme RAS takes to read from and wrte to memory cell.

tRFC

Ths settng determnes the tme RFC takes to read from and wrte to a memory

cell.

tWR

Mnmum tme nterval between end of wrte data burst and the start of a precharge

command. Allows sense amplers to restore data to cells.

tWTR

Mnmum tme nterval between the end of wrte data burst and the start of a col

umn-read command. It allows I/O gatng to overdrve sense amplers before read

command starts.

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MSI H67MA-E35-B3 User Manual Page 38

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