MSI FM2-A85XMA-P33 series User Manual page 52

BIOS Setup
▶ tCL
Controls CAS latency whch determnes the tmng delay (n clock cycles) of startng
a read command after recevng data.
▶ tRCD
Determnes the tmng of the transton from RAS (row address strobe) to CAS
(column address strobe). The less clock cycles, the faster the DRAM performance.
▶ tRP
Controls number of cycles for RAS (row address strobe) to be allowed to pre-charge.
If nsufficent tme s allowed for RAS to accumulate before DRAM refresh, the DRAM
may fal to retan data. Ths tem apples only when synchronous DRAM s nstalled
n the system.
▶ tRAS
Determnes the tme RAS (row address strobe) 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
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.
▶ Advanced Channel 1/ 2 Tmng Configuraton
Press <Enter> to enter the sub-menu. And you can set the advanced memory tmng
for each channel.
▶ Spread Spectrum
Ths functon reduces the EMI (Electromagnetc Interference) generated by modulatng
clock generator pulses.
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