Acer Veriton Z291G Service Guide - Page 23

Advanced Chipset Features Field Intel XD Bit ASF Memory Hole Remapping Video Memory Size DVMT Mode DVMT/Fixed Memory Size Description Select whether to enable the Intel Execute Disable Bit Technology. XD Bit is a hardware-based security feature that can reduce exposure to viruses and malicious-code attacks and prevent harmful software from executing and propagating on the computer or network. ASF is short for Alert Standard Format. When enabled, the ASF controller will be activated and allowed to communicate with a remote management server. When enabled, some or all of the memory between the 2 GB and 4 GB limits to addresses above 4 GB. This is a workaround for the PCI hole or PCI memory hole which is a limitation of 32-bit hardware and 32-bit operating systems that causes a computer to appear to have less memory available than is physically installed. Note: This feature is useful for systems running on 64-bit OS and those 32-bit systems that support the Physical Address Extension method. Displays the size of video memory detected during boot-up. Select the Intel Dynamic Video Memory Technology mode. Select to specify the maximum memory size that can be allocated as graphics memory using the Intel Dynamic Video Memory Technology. Value Enabled Disabled Enabled Disabled Enabled Disabled 1 MB 8 MB Fixed DVMT 128 MB 256 MB Maximum Veriton Z290G Service Guide 15