Abit NV7-133R, User Manual, Page: 41 / 96

Introducing the BIOS
User’s Manual
3-13
You can use the arrow keys to move between the items. Use
PgUP
,
PgDn
,
+
or
-
key to change the values.
When you have finished setting up the chipset, press < ESC > to go back to the main menu.
Note
The parameters in this screen are for system designers, service personnel, and technically competent
users only. Do not reset these values unless you understand the consequences of your changes.
System BIOS Cacheable:
Two options are available: Disabled or Enabled. The default setting is Enabled . When you select Enabled ,
you get faster system BIOS executing speed via the L2 cache.
Video RAM Cacheable:
Two options are available: Disabled or Enabled. The default setting is Enabled . When you select Enable ,
you get faster video RAM executing speed via the L2 cache. You must check your VGA adapter manual
to find out if any compatibility problems will occur.
AGP Aperture Size:
Five options are available: 32MB
(
64MB
(
128MB
(
256MB
(
512MB
(
Back to 32MB. The
default setting is 64MB . 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
http://www.agpforum.org for AGP information.
Memory Timings:
Two options are available: Aggressive
(
Optimal. The default setting is Optimal . Choose Aggressive for
better memory performance, choose Optimal for better memory compability.
CAS Latency Override:
Three options are available: 2 Clocks
(
2.5 Clocks
(
Auto. The default setting is 2.5 Clocks . You can
select SDRAM CAS ( C olumn A ddress S trobe) latency time according your SDRAM specification.