Service and Support

 
Depot Repair Form
 
Direction Desktops
Downloads
Express5800
Servers
Frequently
Asked
Questions
Handheld PCs
Monitors
Notebooks
PowerMate &
Ready ES Pro Desktops
Search
Service Provider
Locator
UltraCare Services
Versa Utilities
Windows Update
Y2K Information

  

BCM 540/541 Motherboard RAM Upgrade

Caution ESD precautions and proper handling procedures must be observed in order to prevent damage to system components.

The BCM 540/541series motherboards have four SIMM sockets configured as two (0-1) banks. The upgrade memory is upgradeable to 128MB. The 72-pin SIMM sockets will accept 1MBx32 (4MB), 2MBx32 (8MB), 4MBx32 (1632MB), and 8MBx32 (32MB) extended data out DRAM SIMMs with the recommended access speed of 60ns or faster. This motherboard will accept either single or double sided SIMMs. Memory type, size, and speed can vary between banks, but cannot vary within each 2-socket bank. This series of motherboards will support 36 bit SIMM modules (parity).

The possible memory upgrade configurations are listed.
They can be installed in any order :

SIMM Type (Amount)
Bank 0

SIMM Type (Amount)
Bank 1

Total System Memory

1M x 32 (4 MB) Empty 8 MB
1M x 32 (4 MB) 1M x 32 (4 MB) 16 MB
1M x 32 (4 MB) 2M x 32 (8 MB) 24 MB
1M x 32 (4 MB) 4M x 32 (16 MB) 40 MB
1M x 32 (4 MB) 8M x 32 (32 MB) 72 MB
2M x 32 (8 MB) Empty 16 MB
2M x 32 (8 MB) 1M x 32 (4 MB) 24 MB
2M x 32 (8 MB) 2M x 32 (8 MB) 32 MB
2M x 32 (8 MB) 4M x 32 (16 MB) 48 MB
2M x 32 (8 MB) 8M x 32 (32 MB) 80 MB
4M x 32 (16 MB) Empty 32 MB
4M x 32 (16 MB) 1M x 32 (4 MB) 40 MB
4M x 32 (16 MB) 2M x 32 (8 MB) 48 MB
4M x 32 (16 MB) 4M x 32 (16 MB) 64 MB
4M x 32 (16 MB) 8M x 32 (32 MB) 96 MB
8M x 32 (32 MB) Empty 64 MB
8M x 32 (32 MB) 1M x 32 (4 MB) 72 MB
8M x 32 (32 MB) 2M x 32 (8 MB) 80 MB
8M x 32 (32 MB) 4M x 32 (16 MB) 96 MB
8M x 32 (32 MB) 8M x 32 (32 MB) 128 MB

Installing SIMMs
The following is a procedure for installing SIMM modules into a SIMM socket.

Step 1:
Line up the SIMM module as illustrated in Figure 2, pin 1 is indicated by a small triangle on the motherboard. Insert the module into the socket at roughly a 45 degree angle. The SIMM module is keyed and can only be inserted one way.

Step 2:
Pivot the SIMM module up until it is at a 90 degree angle in relation to the motherboard. The locking tabs should snap into place when the SIMM is in the proper position as illustrated in Figure 2.

Figure 2
STEP 1 STEP 2 STEP 3

Once the SIMM modules are installed, the system will display the correct amount of memory, since the system automatically detects the amount installed; there are no jumper settings for memory configuration. The memory should be enabled and fully functional.

Document Information
KBID# 058620, Last Reviewed: November 11, 1999
Document Path: