Chapter 2 – MSI X79A-GD45 (8D) User Manual

Page 62

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2-12

BIOS Setup

MS-7760

Chapter 2

BIOS Setup

MS-7760

Chapter 2

tRAS

Determnes the tme RAS (row address strobe) takes to read from and wrte to mem-

ory cell.

tRFC

Ths settng determnes the tme RFC takes to read from and wrte to a memory

cell.

tWR

Determnes mnmum tme nterval between end of wrte data burst and the start of a

pre-charge command. Allows sense amplfiers to restore data to cell.

tWTR

Determnes mnmum tme nterval between the end of wrte data burst and the start

of a column-read command; allows I/O gatng to overdrve sense amplfies before

read command starts.

tRRD

Specfies the actve-to-actve delay of dfferent banks.

tRTP

Tme nterval between a read and a precharge command.

tFAW

Ths tem s used to set the tFAW (four actvate wndow delay) tmng.

tWCL

Ths tem s used to set the tWCL (Wrte CAS Latency) tmng.

tCKE

Ths tem s used to set the Pulse Wdth for DRAM module.

tRTL

Ths tem s used to set Round Trp Latency settngs.

tXP

Ext Power Down wth DLL on to any vald command; Ext Precharge Power Down

wth DLL frzon to commands not requrng a locked DLL.

==Advanced Tmng Configuraton==

Follwng tems are used to set the read/ wrte tmngs for memory.

tRRDR

Read-Read Dfferent Rank, same DIMM.

tRRDD

Read-Read Dfferent Rank.

tWWDR

Wrte-Wrte Dfferent Rank, same DIMM.

tWWDD

Wrte-Wrte Dfferent Rank.

tRWDRDD

Read-Wrte Dfferent Ranks same or Dfferent DIMM.

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