Configuring cache memory

Enabling cache memory improves system performance when retrieving and processing large amounts of data on systems with external cache installed. To avoid possible configuration problems, leave these options at their default settings unless a peripheral you have installed requires that you make changes. See your peripheral documentation for information.

The table below lists the memory cache options.

Memory cache options

Option

Settings

 

Description

 

 

 

 

Cache Auto

Enabled*

 

Enables or disables automatic

Configuration

Disabled

 

assignment of cache speed

 

 

 

 

External cache

Enabled

*

Enables or disables the system’s

 

Disabled

 

external (secondary) caching

 

 

 

 

System BIOS cacheable

Enabled

*

Enables or disables caching of

 

Disabled

 

the system BIOS memory area

 

 

 

 

Video BIOS cacheable

Enabled

*

Enables or disables caching of

 

Disabled

 

the video BIOS memory area

 

 

 

 

L2 cache write back

Enabled

*

Selects write-back mode for

 

 

 

external (secondary) cache

 

Disabled

 

Selects write-through mode for

 

 

 

external (secondary) cache

 

 

 

 

Cache speed

3-2-2-2*

 

Sets the number of cycle times

 

3-1-1-1

 

to be inserted during read/write

 

2-2-2-2

 

operations (can set only if Auto

 

2-1-1-1

 

Configuration is disabled)

 

 

 

 

* Default setting

 

 

 

Running SETUP and Installing Drivers 2-9