Acer Power SD Service Manual page 39

The following table describes each parameter under the sub-menu. Settings in boldface are the default and
suggested values.
Parameter
System Performance
CAS Latency Setting
The other two parameters under the Advanced Chipset Features are presented below. Settings in boldface
are the deafult and suggested values.
Parameter
Memory Hole at 15M-16M
AGP Aperture Size (MB)
34
Description
The DRAM timing is controlled by the DRAM
Timing Registers. The timings programmed into
this register are dependent on the system
design. Slower rates may be required in certain
system designs to support loose layouts or
slower memory.
When synchronous DRAM is installed, the
number of clock cycles of CAS latency depends
on the DRAM timing.
Description
You can reserve this area of system memory for
ISA adapter ROM. When this area is reserved, it
cannot be cached. The user information of
peripherals that need to use this area of system
memory usually discuss their memory
requirements.
This item lets you determine the effective size of
the AGP Graphic Aperture.
Options
Normal Mode
Safe Mode
Fast mode
Turbo Mode
Ultra Mode
2T, 2.5T, 3T
Options
Disabled
Enabled
64, 4,8,16,32,128 and 256.
Chapter 2