Acer Veriton 1000 Aspire L350 & Veriton 1000 Service Guide - Page 38

Parameter C1E Function Execute Disable Bit Description Also called "Enhanced Halt State" function. It is improved function for Intel (R) Pentium 4 processor C1 Halt state. The operating system will send out HLT command to the processor while the system loading is not high. This allows the processor to enter power-saving C1 halt state and to reduce the loading for the processor. Basically, C1E function is very similar to C1 Halt State. The difference is C1E function can lower down the processor's voltage and clock rate. C1E function together with EIST can provide a better energy-saving environment for the processor. Auto Enabled Disabled This BIOS feature is actually a toggle for the processor's Execute Disable Bit feature. In fact, the acronym XD is short for Execute Disable and is specific to Intel's implementation. AMD's implementation is called NX, short for No Execute. Enabled Disabled When enabled, the processor prevents the execution of code in data-only memory pages. This provides some protection against buffer overflow attacks. When disabled, the processor will not restrict code execution in any memory area. This makes the processor more vulnerable to buffer overflow attacks. Virtualization Technology It is highly recommended that you enable this BIOS feature for increased protection against buffer overflow attacks. This item allows you to enable or disable Intel (R) Virtualization Technology function. Intel(R)SpeedStep(tm) Tech. Enables or disables Intel(R)SpeedStep(tm) Tech. function. Enabled Disabled Enabled Disabled Options 30 Chapter 2