Dell POWEREDGE 1855 - Manual (Page 59)

Table 6-2. Allowable Memory Module Configurations – Single-Ranked and Dual-Ranked Memory Modules
Installing Memory Modules
1. Remove the server module. See " Removing a Server Module ."
2. Open the server module. See " Opening the Server Module ."
3. Locate the memory module sockets. See Figure A -3 in "Server Module Board Connectors."
4. Press the ejectors on the memory module socket down and out, as shown in Figure 6 -16 , to allow the memory module to be inserted into the socket.
Figure 6-16. Installing and Removing a Memory Module
5. Align the memory module's edge connector with the alignment key on the memory module socket, and insert the memory module in the socket.
6. Press down on the memory module with your thumbs while pulling up on the ejectors with your index fingers to lock the memory module into the socket.
When the memory module is properly seated in the socket, the ejectors on the memory module socket align with the ejectors on the other sockets that
have memory modules installed.
7. Repeat step 3 through step 6 of this procedure to install the remaining memory modules. See Table 6 -1 and Table 6 -2 for sample memory
configurations.
8. Close the server module. See " Closing the Server Module ."
9. Install the server module. See " Installing a Server Module ."
10. (Optional) Press to enter the System Setup program, and check the System Memory setting on the main System Setup screen.
The system should have already changed the value to reflect the newly installed memory.
8 GB 2 GB 2 GB 1 GB 1 GB 1 GB 1 GB
8 GB 4 GB 4 GB none none none none
12 GB 2 GB 2 GB 2 GB 2 GB 2 GB 2 GB
16 GB 4 GB 4 GB 4 GB 4 GB none none
DIMM1_A DIMM1_B DIMM2_A DIMM2_B DIMM3_A DIMM3_B
Single Rank Single Rank none none none none
Dual Rank Dual Rank none none none none
Single Rank Single Rank Single Rank Single Rank none none
Dual Rank Dual Rank Dual Rank Dual Rank none none
Dual Rank Dual Rank Single Rank Single Rank none none
Single Rank Single Rank Single Rank Single Rank Single Rank Single Rank
Dual Rank Dual Rank Single Rank Single Rank Single Rank Single Rank
CAUTION: Many repairs may only be done by a certified service technician. You should only perform troubleshooting and simple repairs as
authorized in your product documentation, or as directed by the online or telephone service and support team. Damage due to servicing that is not
authorized by Dell is not covered by your warranty. Read and follow the safety instructions that came with the product.
NOTE: The memory module socket has an alignment key that allows you to install the memory module in the socket in only one way.