MSI H55M-E21 - Manual (Page 58)

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BIOS Setup MS-7636
Chapter 3
BIOS Setup MS-7636
Chapter 3
CH1/ CH2 tRTP
Tme nterval between a read and a precharge command.
CH1/ CH2 tFAW
Ths tem s used to set the tFAW tmng.
Current CH1/ CH2 tdrRdTRd/ tddRdTRd/ tsrRdTWr/ tdrRdTWr/ tddRdTWr/
tsrWrTRd/ tddWrTWr/ tsrRDTRd/ tsrWrTWr
These tem show the advanced DRAM tmngs.
Channel 1/ Channel2 Advanced Memory Settng
Settng to [Auto] enables the advance memory tmng automatcally to be determned
by BIOS. Settng to [Manual] allows you to set the followng advanced memory tm-
ngs.
Memory Rato
Ths tem allows you to set the memory multpler.
Adjusted DRAM Frequency (MHz)
It shows the adjusted DRAM frequency. Read-only.
QPI Rato
Ths tem allows you to set the QPI multpler.
Adjusted QPI Frequency (MHz)
It shows the adjusted QPI frequency. Read-only.
Auto Dsable PCI Frequency
When set to [Enabled], the system wll remove (turn off) clocks from empty PCI slots to
mnmze the electromagnetc nterference (EMI).
DRAM Voltage (V)
These tems are used to adjust the voltage of Memory.
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.
Important
If you do not have any EMI problem, leave the settng at [Dsabled] for optmal system
stablty and performance. But f you are plagued by EMI, select the value of Spread
Spectrum for EMI reducton.
The greater the Spread Spectrum value s, the greater the EMI s reduced, and the
system wll become less stable. For the most sutable Spread Spectrum value, please
consult your local EMI regulaton.
Remember to dsable Spread Spectrum f you are overclockng because even a slght
jtter can ntroduce a temporary boost n clock speed whch may just cause your over-
clocked processor to lock up.
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