Asus P/I-P55T2P4S - Manual (Page 13)

ASUS P/I-P55T2P4S User’s Manual 7
III. INSTALLATION
Jumper Settings
1. Memory Cacheable Size (CBSIZE)
The default of 64MB uses only the onboard TAG SRAM which allows cacheable
memory up to 64MB. If you install DRAM above 64MB and wish to allow
cacheable memory above 64MB, you need to install a TAG SRAM upgrade and
set this jumper to 512MB. See this section for “TAG SRAM Upgrade.”
Cacheable Size CBSIZE
64MB [1-2] (Default)
512MB [2-3]
Cacheable Size (64MB / 512MB)
64MB Cacheable (Default) 512MB Cacheable
CBSIZE
1
2
3
CBSIZE
1
2
3
TAG SRAM Upgrade
The purpose of this SRAM is described by "Memory Cacheable Size" jumper. You
must use a standard 5Volt SRAM chip that is 15ns or faster.
Insert one 16K8 or 32K8
SRAM chip as shown by
the Top view with the semi-
circle "Indention" on the
same side as the "Notch."
TAG SRAM Upgrade
Top Side
Indention Notch
Motherboard
III. INST
ALLA
TION
(Jumpers)