Upgrading Sdram Memory - AlphaPC 164LX User Manual

Upgrading SDRAM Memory

Table 5–1 AlphaPC 164LX SDRAM Memory Configurations
Total
Memory Bank 0 (J8 and J9) Bank 1 (J10 and J11) SEC DIMM Part Number
128MB Two of 4Mb
Two of 8Mb
160MB Two of 8Mb
192MB Two of 8Mb
256MB Two of 8Mb
Two of 16Mb
384MB Two of 16Mb x 72 Two of 8M x 72
512MB Two of 16Mb
The table above lists some basic memory configurations for reference.
Note:
There are additional configurations not listed and BIOS will detect memory
sizes automatically.
•
1Mb x 72 is not supported because required minimum memory density is 32MB.
•
Each DIMM must be 168-pin unbuffered version with frequency of 100MHz
•
All DIMMs in a common bank must be of equal size.
•
Each bank must contain two DIMMs because the memory controller requires a
128bit data width.
5.2 Upgrading SDRAM Memory
You can upgrade memory in the AlphaPC 164LX by adding more DIMMs or
replacing the ones that you have with a greater size. Refer to Figure 2–1 for DIMM
connector locations.
Use the following general guidelines:
1. Observe antistatic precautions. Handle DIMMs only at the edges to prevent
damage.
2. Remove power from the system.
3. Open levers and align the DIMM.
4. Firmly push the module into the connector. Ensure that the DIMM snaps into the
plastic locking levers on both ends.
5. Restore power to the system.
Memory and Microprocessor Configuration
5–2
72 Two of 4Mb 72
X X
72 None
X
72 Two of 2Mb 72
X X
72 Two of 4Mb 72
X X
72 Two of 8Mb 72
X X
72 None
X
72 Two of 16Mb 72
X X
(Sheet 2 of 2)
KMM374S403BTL
KMM374S823BTL
KMM374S823BTL
KMM374S823BTL
KMM374S823BTL
KMM374S1623ATL
KMM374S1623ATL
KMM374S1623ATL