User`s manual

3-10
AIMB-253 Mainboard
Precharge Delay (tRAS)
Theeldspeciestheidlecyclesbeforeprecharginganidlebank.
System Memory Frequency
UsethisitemtoconguretheclockfrequencyoftheinstalledDRAMs.
**VGA Setting**
ThefollowingitemsallowyoutoconguretheVGAsettingsofthesystem.
PEG/Onchip VGA Control
This setting allows you to select whether to use the onchip graphics processor or
the PCI Express card.
When set to [Onchip VGA], the motherboard boots up using the onboard graph-
ics processor, even when a PCI Express graphics card is installed.
When set to [PEG Port], the motherboard boots up using the PCI Express graph-
ics card, if one is installed. Otherwise, it defaults to the onboard graphics proces-
sor.
When set to [Auto], the BIOS checks to see if a PCI Express graphics card is in-
stalled. If it detects that a PCI Express graphics card is present, the motherboard
boots up using that card. Otherwise, it defaults to the onboard graphics proces-
sor.
Warning:
(a) Set to [PEG Port] only when graphics card is installed. If set to [PEG Port]
without any graphic card installed, system fails to boot up. Please clean
CMOS to restore default setting.
(b) If PCI Express graphic card is installed, please set to [PEG Port]. [Auto] and
[Onchip VGA] will make system fail to enter OS.
On-Chip Frame Buffer Size
Theeldspeciesthesizeofsystemmemoryallocatedforvideomemory.
Boot Display
Usetheeldtoselectthetypeofdeviceyouwanttouseasthedisplay(s)ofthe
system.