Foxconn P55A English Manual. - Page 37

3 Advanced Chipset Features CMOS Setup Utility - Copyright (C) 1985-2009, American Megatrends, Inc. Advanced Chipset Features IMC Type : *Field Family IMC Help Item Management Engine Version : 6.0.0.1126 ENABLE: Allow Memory Remap Feature [Enabled] remapping of PCI MMIO Allocation: 4GB To 3328MB overlapped PCI memory Initate Graphic Adapter [PCIE/PCI] above the total SLP_S4# Min. Assertion Width [1 to 2 seconds] physical memory. DISABLE: Do not allow remapping of memory. Move Enter:Select +/-/:Value F10:Save ESC:Exit F1:General Help F9:Optimized Defaults ► Memory Remap Feature This item is used to enable/disable memory remapping around memory hole. PCI doesn't actually care much which addresses are used, but by convention the PC platform puts them at the top of the 32-bit address space. For many years it wasn't possible or practical to put that much RAM into a PC. But now it is, so it's up to the memory controller and host bridge to figure out what to do. Many systems cause that high RAM to simply be ignored, resulting in the loss of effective RAM. More complex systems will take the RAM that would occupy that 3.5-4GB address space and re-map it into the 4.0-4.5 address space. The RAM doesn't care because it's just an array of storage cells, it's up to the memory controller to associate addresses with those storage cells. Of course, that only works if you're using a 64-bit (or 32bit physical address extension (PAE) enabled) OS that can deal with physical addresses larger than 32 bits. Once this option is enabled, BIOS will display the true size of memory installed. ► Initate Graphic Adapter This item is used to select which graphics controller is used as the primary boot device. ► SLP_S4# Min. Assertion Width SLP_S4# is a signal for power plane control. This signal shuts off power to all non-critical systems when in the S4 (Suspend to Disk) or S5 (Soft Off) state. This setting indicates the minimum assertion width of the SLP_S4# signal to ensure that the DRAMs have been safely power-cycled. Setting values are: [4 to 5 seconds], [3 to 4 seconds], [2 to 3 seconds], [1 to 2 seconds]. 30