MSI Big Bang-Marshal (B3) Manual - Manual (Page 57)

BIOS Setup MS-7670
Chapter 3
3-9
BIOS Setup MS-7670
Chapter 3
tRP
Ths settng controls the number of cycles for Row Address Strobe (RAS) to be
allowed to precharge. If nsufficent tme s allowed for the RAS to accumulate ts
charge before DRAM refresh, refreshng may be ncomplete and DRAM may fal
to retan data. Ths tem apples only when synchronous DRAM s nstalled n the
system.
tRAS
Ths settng determnes the tme RAS takes to read from and wrte to memory cell.
tRFC
Ths settng determnes the tme RFC takes to read from and wrte to a memory
cell.
tWR
Mnmum tme nterval between end of wrte data burst and the start of a precharge
command. Allows sense amplfiers to restore data to cells.
tWTR
Mnmum tme nterval between the end of wrte data burst and the start of a col-
umn-read command. It allows I/O gatng to overdrve sense amplfiers 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 tCKE tmng.
Advanced Channel 1/ 2 Tmng Configuraton
Press <Enter> to enter the sub-menu. And you can set the advanced memory tmng
for each channel.
tRRDR/ tRRDD/ tWWDR/ tWWDD/ tRWDRDD/ tWRDRDD/ tRWSR
These tems s used to set the memory tmngs for memory channel 1/ 2.
Spread Spectrum
When the manboard’s clock generator pulses, the extreme values (spkes) of the pulses
create EMI (Electromagnetc Interference). The Spread Spectrum functon reduces the
EMI generated by modulatng the pulses so that the spkes of the pulses are reduced
to flatter curves.
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