HP Integrity rx2620 User's & Service Manual page 49

4A, 4B and 5A, 5B must be matched pairs of equal size
NOTE: DIMMs match if they have the same Hewlett Packard Enterprise part number.
The DIMMs are 184-pin, industry-standard, DDR266, CL2, registered ECC modules.
Industry standard means the DIMMs meet specifications detailed in the JDEC Standard
No. 21-C, Module 4, titled "PC2100 and PC1600 DDR SDRAM Registered DIMM
Design Specification." A complete and current list of acceptable DIMMs is provided
on the Hewlett Packard Enterprise parts website at: http://partsurfer.hpe.com.
Module sizes can be mixed, as long as DIMMs in each quad match, except when
using 4 GB DIMMs. If you install 4 GB DIMMS, the only configuration allowed is 8
4GB DIMMs. For example:
It is acceptable to load a quad of 256 MB DIMMs in sockets 0A, 0B, 1A and 1B;
and a quad of 1 GB DIMMs in sockets 2A, 2B, 3A and 3B.
If using 4 GB DIMMs, the only configuration allowed is 4 GB DIMMs in slots 0A,
0B, 1A, 1B, 2A, 2B, 3A, and 3B. Slots 4A, 4B, 5A, and 5B must remain empty.
The memory subsystem supports chip-spare functionality. Chip spare enables an
entire SDRAM chip on a DIMM to be bypassed (logically replaced) in the event that
a multi-bit error is detected on that SDRAM.
To use the chip spare functionality, only DIMMs built with x4 SDRAM parts can be
used, and these DIMMs must be loaded in quads (two DIMMs per memory cell, loaded
in the same location in each memory cell).
Each DIMM within a quad must be identical to all the other DIMMs in the quad.
To install DIMMs:
1. Power off the server and disconnect all the cables. See
(page 27).
2. Remove the server top metal cover. See
(page 33).
CAUTION: To ensure that memory modules are not damaged during removal
or installation, power off the server and unplug the power cord from the AC power
outlet. Wait until the LED on the back of the power supply turns off before
removing or installing memory.
3. Holding the memory module by its left and right edges, insert the module into the
socket.
The memory modules are keyed and can only be inserted in one direction. When
the module is correctly seated, the retainer clips return to their fully upright
position.
4. Snap the retainer clips firmly into place to ensure the DIMMs are seated properly.
5. Gently and evenly push on each side of the DIMM until it seats in the socket.
6. Ensure the extraction levers are in the closed position. See
7. Replace the server top metal cover, reconnect all cables.
8. Power on the server.
9. Verify that the newly installed memory works:
Run the info mem command at the EFI shell prompt, or
Run the memdiag from the Offline Diagnostics CD to ensure that the memory
is functional
Monitor the System Event Log (SEL) to ensure there are no events showing
memory problems.
"Powering Off the Server"
"Removing the Top Metal Cover"
Figure 38.
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