MSI X58 Platinum Series User Manual page 66

CPU / PCI Express Amplitude Control
These items are used to select the CPU/ PCI Express clock amplitude.
CPU CLK Skew/ IOH CLK Skew
These items are used to select the CPU/ IOH chipset clock skew. They can help
CPU to reach the higher overclocking performace.
Adjust PCI Frequency (MHz)
This field allows you to select the PCI frequency (in MHz).
Adjust PCI-E Frequency (MHz)
This field allows you to select the PCIE frequency (in MHz).
Auto Disable DRAM /PCI Frequency
W hen set to [Enabled], the system will remove (turn off) clocks from empty DIMM and
PCI slots to minimize the electromagnetic interference (EMI).
CPU Voltage (V)/ QPI Voltate (V))/ CPU PLL Voltage (V)/ DRAM Voltage (V)/
DDR _V RE F_ CA_ A (V )/ DDR _ VR EF _C A_ B ( V) / DDR_ VR E F_ CA_C ( V) /
DDR_VREF_DQ_A (V)/DDR_VREF_DQ_B (V), DDR_VREF_DQ_C (V)/ IOH Voltage
(V), ICH Voltage (V)
These items are used to asjust the voltage of CPU, Memory, QPI and chipset.
For CPU Voltage:
The value here is the offset for you to adjust/add based on the current CPU voltage.
Please read the real-time CPU voltage in "CPU Vcore" in the "H/W monitor" page.
Please note the based CPU Voltage will vary depending on the different CPU you
install.
For QPI Voltage:
The value here is the offset for you to adjust/add based on the current QPI voltage.
The default based QPI Voltage is from 1.1V to 1.22V, and it will vary depending on the
different CPU you install. You can read the QPI voltage in GreenPower Center.
For DRAM Voltage:
According to the Inte CPU spec, DRAM Voltage setting 1.65V may damage the CPU
permanently. It is strongly recommended that you install the DRAM with the voltage
setting below 1.65V. You can read the DRAM voltage in GreenPower Center.
Spread Spectrum
W hen 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 reduction. 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.
BIOS Setup
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