MSI Z77A User Guide - Page 56

Pll Voltage/ Ddr_vref_ca_a/ Ddr_vref_ca_b/ Ddr_vref_da_a/ Ddr_vref

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BIOS Setup ▶ Spread Spectrum This function reduces the EMI (Electromagnetic Interference) generated by modulating clock generator pulses. Important • 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, select the value of Spread Spectrum for EMI reduction. • The greater the Spread Spectrum value is, the greater the EMI is reduced, and the system will become less stable. For the most suitable Spread Spectrum value, please consult your local EMI regulation. • 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. ▶ Vdroop Control This item is used to select the VDroop control mode. ▶ CPU Core OCP Expander This item is used to expand the limitation of CPU Over Current Protection. The higher expanding value indicates less CPU protection. So please adjust the CPU voltage carefully if needed. ▶ CPU Core Engine Speed This item allows you to increase the PWM working speed to stabilize CPU Core voltage and minimize ripple range. Increasing the PWM working speed will cause higher temperture of MOSFET. So please make sure a cooling solution is well-prepared for MOSFET before you increase the value. ▶ CPU Core Voltage/ DRAM Voltage/ GPU Voltage/ System Agent Voltage (SA)/ CPU PLL Voltage/ DDR_VREF_CA_A/ DDR_VREF_CA_B/ DDR_VREF_DA_A/ DDR_VREF_ DA_B/ PCH 1.05 These items are used to adjust the voltage of CPU, Memory, GPU and chipset. ▶ Current CPU Core Voltage/ Current CPU I/O Core Voltage/ Current DRAM Voltage/ Current GPU Voltage These items show current CPU/ CPU I/O/ DRAM/ GPU voltage. Read-only. ▶ Overclocking Profiles Press to enter the sub-menu. ▶ Overclocking Profile 1/ 2/ 3/ 4/ 5/ 6 Press to enter the sub-menu. ▶ Set Name for Overclocking Profile 1/ 2/ 3/ 4/ 5/ 6 Give a name by typing in this item. ▶ Save Overclocking Profile 1/ 2/ 3/ 4/ 5/ 6 Save the current overclocking settings to ROM for selected profile. ▶ Load/ Clear Overclocking Profile 1/ 2/ 3/ 4/ 5/ 6 Load/ Clear the stored profile settings from ROM. 2-14

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2-14
BIOS Setup
Spread Spectrum
Th±s funct±on reduces the EMI (Electromagnet±c Interference) generated by modulat±ng
clock generator pulses.
Important
If you do not have any EMI problem, leave the sett±ng at [D±sabled] for opt±mal system
stab±l±ty and performance. But ±f you are plagued by EMI, select the value of Spread
Spectrum for EMI reduct±on.
The greater the Spread Spectrum value ±s, the greater the EMI ±s reduced, and the
system w±ll become less stable. For the most su±table Spread Spectrum value,
please
consult your local EMI regulat±on.
Remember to d±sable Spread Spectrum ±f you are overclock±ng because even a sl±ght
j±tter can ±ntroduce a temporary boost ±n clock speed wh±ch may just cause your over-
clocked processor to lock up.
Vdroop Control
Th±s ±tem ±s used to select the VDroop control mode.
CPU Core OCP Expander
Th±s ±tem ±s used to expand the l±m±tat±on of CPU Over Current Protect±on. The h±gher
expand±ng value ±nd±cates less CPU protect±on. So please adjust the CPU voltage
carefully ±f needed.
CPU Core Eng±ne Speed
Th±s ±tem allows you to ±ncrease the PWM work±ng speed to stab±l±ze CPU Core voltage
and m±n±m±ze r±pple range. Increas±ng the PWM work±ng speed w±ll cause h±gher
temperture of MOSFET. So please make sure a cool±ng solut±on ±s well-prepared for
MOSFET before you ±ncrease the value.
CPU Core Voltage/ DRAM Voltage/ GPU Voltage/ System Agent Voltage (SA)/ CPU
PLL Voltage/ DDR_VREF_CA_A/ DDR_VREF_CA_B/ DDR_VREF_DA_A/ DDR_VREF_
DA_B/ PCH 1.05
These ±tems are used to adjust the voltage of CPU, Memory, GPU and ch±pset.
Current CPU Core Voltage/ Current CPU I/O Core Voltage/ Current DRAM Voltage/
Current GPU Voltage
These ±tems show current CPU/ CPU I/O/ DRAM/ GPU voltage. Read-only.
Overclock±ng Profiles
Press <Enter> to enter the sub-menu.
Overclock±ng Profile 1/ 2/ 3/ 4/ 5/ 6
Press <Enter> to enter the sub-menu.
Set Name for Overclock±ng Profile 1/ 2/ 3/ 4/ 5/ 6
G±ve a name by typ±ng ±n th±s ±tem.
Save Overclock±ng Profile 1/ 2/ 3/ 4/ 5/ 6
Save the current overclock±ng sett±ngs to ROM for selected profile.
Load/ Clear Overclock±ng Profile 1/ 2/ 3/ 4/ 5/ 6
Load/ Clear the stored profile sett±ngs from ROM.
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