MSI 790XT-G45 Series Manual page 57

the DDR devce.
▶ tRFC0~3
When the DRAM Tmng Mode sets to [DCT 0], [DCT1] or [Both], these fields are
adjustable. These settngs determne the tme RFC take to read from and wrte to
memory cells.
▶ 1T/2T Memory Tmng
When the DRAM Tmng Mode sets to [DCT 0], [DCT1] or [Both], the field s adjust-
able. Ths field controls the SDRAM command rate. Selectng [1T] makes SDRAM
sgnal controller to run at 1T (T=clock cycles) rate. Selectng [2T] makes SDRAM
sgnal controller run at 2T rate.
▶ DCT Unganged Mode
Ths feature s used to Integrate two 64-bt DCTs nto a 128-bt nterface.
▶ FSB/DRAM Rato
Ths tem allows you to select the rato of FSB/ DRAM.
▶ Adjusted DRAM Frequency (MHz)
It shows the adjusted Memory frequency. Read-only.
▶ HT Lnk Speed
Ths tem allows you to set the Hyper-Transport Lnk speed. Settng to [Auto], the sys-
tem wll detect the HT lnk speed automatcally.
▶ Adjust PCI-E Frequency (MHz)
Ths field allows you to select the PCIE frequency (n MHz).
▶ Auto Dsable DIMM/PCI Frequency
When set to [Enabled], the system wll remove (turn off) clocks from empty DRAM/ PCI
slots to mnmze the electromagnetc nterference (EMI).
▶ CPU Voltage (V)/ DRAM Voltage (V)/ NB Voltage (V)/ HT Lnk Voltage (V)
These tems are used to adjust the voltage of CPU, Memory and chpset.
▶ 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. 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, set to Enabled
for EMI reducton. 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 overclocked processor to lock up.
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.
MS-7388 MS-7388
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