User Guide

BIOS Setup 3-13
User’s Manual
AGP Graphics Aperture Size:
Two options are available: 32M
)
64M. The default setting is
64M
. This option specifies the amount of
system memory that can be used by the AGP device. The aperture is a portion of the PCI memory address
range dedicated for graphics memory address space. Host cycles that hit the aperture range are forwarded
to the AGP without any translation. See www.agpforum.org for AGP information.
Display Cache Frequency
Two options are available: 100 MHz and 133 MHz. The default setting is
100 MHz
. You can choose the
running speed for local memory, but if your memory module does not support the speed you choose, it
may cause a system boot failure or data loss problem.
Onboard Display Cache Setting:
When using the onboard VGA function, you had best use the default setting.
CAS# Latency:
Two options are available: 2 and 3. The default setting is
3
. You can select the local memory clock
periods.
Paging Mode Control:
Two options are available: Close and Open. The default setting is
Open
. You can select the paging mode
control to open or close.
RAS-to-CAS Override:
Two options are available: by CAS# LT and Override (2). The default setting is
by CAS# LT
. This is the
display cache clock period control.
RAS# Timing:
Two options are available: Slow and Fast. The default setting is
Fast
. This item controls RAS# active to
Protegra, and refresh to RAS# active delay (in local memory area).
RAS# Precharge Timing:
Two options are available: Slow and Fast. The default setting is
Fast
. This item controls RAS# precharge
(in local memory area).