MSI PH61A User Guide - Page 51

Chapter 3 MS-7732 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. ▶ DRAM Voltage This item is used to adjust the memory voltage. ▶ CPU Features Press to enter the sub-menu. ▶ Active Processor Cores This item allows you to select the number of active processor cores. ▶ Limit CPUID Maximum It is designed to limit the listed speed of the processor to older operating systems. ▶ Execute Disable Bit Intel's Execute Disable Bit functionality can prevent certain classes of malicious "buffer overflow" attacks when combined with a supporting operating system. This functionality allows the processor to classify areas in memory by where application code can execute and where it cannot. When a malicious worm attempts to insert code in the buffer, the processor disables code execution, preventing damage or worm propagation. ▶ Intel Virtualization Tech This item is used to enable/disable the Intel Virtualization technology. For further information please refer to Intel's official website. ▶ Power Technology This item allows you to select the Intel Dynamic Power technology mode. ▶ C1E Support To enable this item to read the CPU power consumption while idle. Not all processors support Enhanced Halt state (C1E). 3-15