4-4
Owner's Handbook
4.2
Upgrading the Second-Level Cache
The Pentium CPU board has a standard 512 KB of cache memory expandable
to 1 MB.
NOTE:
Read the electrostatic discharge (ESD) precautions in
Chapter 1 before handling chips.
Follow these steps to upgrade the second-level cache:
1.
Turn off the system and unplug the power cable from the wall socket.
2.
Detach the CPU board from the system board.
3.
Detach the heat sink by removing the clip and the four screws securing it
to the CPU board. (You do not need to remove the fan from the heat
sink.)
4.
Remove the original SRAM chips.
5.
Carefully insert the new SRAM chips on the sockets. Be careful not to
bend any pins.
6.
Change the appropriate jumper settings. Refer to Table 4-3 for the settings.
7.
Re-attach the heat sink to the board with the four screws and the clip.
8.
Re-install the CPU board to the system board and connect the appropriate
cables.
Table 4-1
Second-level Cache Upgrade (Pentium CPU Board)
SRAM
Tag RAM
Dirty RAM
Cache Size
(15 ns)
(12 ns)
(12 ns)
512 KB
32K*8 x 16 32K*8 x 1
16K*1 x 1
1 MB
128K*8 x 8 32K*8 x 1
64K*1 x 1
