18 Chapter 2Advanced Chipset ConfigurationIntel EIST This item allows users to enable or disable the EIST (Enhanced IntelSpeedStep technology).EnabledDisabledIntel Turbo Boost This item allows users to enable or disable the Intel Turbo Boost. EnabledDisabledIntel AES-NI Enables or disables Advanced Encryption Standard New Instructions(AES-NI).EnabledDisabledIntel XD Bit When enabled, the processor disables code execution when a wormattempts to insert a code in the buffer preventing damage and wormpropagation. When disabled, the processor forces the Execute Disable (XD)Bit feature flag to always return to 0.EnabledDisabledIntel VT Enables or disables the Virtualization Technology (VT) availability. Ifenabled, a virtual machine manager (VMM) can utilize the additionalhardware virtualization capabilities provided by this technology.NOTE: A full reset is required to change the setting.EnabledDisabledIntel AMT This item allows you to enable or disable the Intel VirtualizationaTechnology(IntelAMT) function.EnabledDisabledPrimary Video Select a graphic controller as a primary boot device. AutoPCIEOnboard VGA