User`s manual

3-22
MS-7550 Mainboard
DRAM Timing Mode
Setting to [Auto] enables DRAM CAS# Latency automatically to be determined by
BIOS based on the configurations on the SPD (Serial Presence Detect) EEPROM
on the DRAM module.
1T/2T Memory Timing
This field controls the SDRAM command rate. Selecting [1T] makes SDRAM
signal controller to run at 1T (T=clock cycles) rate. Selecting [2T] makes SDRAM
signal controller run at 2T rate.
Bank Interleaving
This field selects 2-bank or 4-bank interleave for the installed SDRAM. Disable
the function if 16MB SDRAM is installed.
DCT Unganged Mode
This is used to enable/ disable the DCT Unganged Mode (for Phenom only).
EPP Technology Support
This is used to enable/ disable the EPP technology.
FSB/DRAM Ratio
This item will allow you to adjust the ratio of FSB to memory.
Adjusted DRAM Frequency (MHz)
It shows the adjusted DRAM frequency. Read-only.
HT Link Speed
This item allows you to set the Hyper-Transport Link speed. Setting to [Auto], the
system will detect the HT link speed automatically.
Adjust PCI-E Frequency (MHz)
This field allows you to select the PCIE frequency (in MHz).
Auto Disable PCI Frequency
When set to [Enabled], the system will remove (turn off) clocks from empty PCI slots
to minimize the electromagnetic interference (EMI).
CPU VDD Voltage (V) / CPU-NB VDD Voltage (V)/ CPU Voltage (V) / CPU-NB
Voltage (V)/ DRAM Voltage (V)/ NB Voltage (V)/ HT Link Voltage (V)/ MCT
Voltage (V)
These items are used to asjust the voltage of CPU, Memory, FSB and chipset.
Spread Spectrum
When the motherboard’s clock generator pulses, the extreme values (spikes) of the
pulses create EMI (Electromagnetic Interference). The Spread Spectrum function
reduces the EMI generated by modulating the pulses so that the spikes of the pulses
are reduced to flatter curves. If you do not have any EMI problem, leave the setting at
Disabled for optimal system stability and performance. But if you are plagued by EMI,
set to Enabled for
EMI reduc
tion. Remember to disable Spread Spectrum if you are
overclocking because even a slight jitter can introduce a temporary boost in clock
speed which may just cause your overclocked processor to lock up.
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