Install a DIMM
Use this procedure to install DIMMs for a memory upgrade or a
configuration change, or as part of a DIMM reset (removal and
Unpack the replacement DDR4 DIMM and place it on an antistatic
Ensure that the replacement DDR4 DIMM matches the size of the DIMM it
You must not replace a dual-rank DIMM with a quad-rank DIMM and vice
versa. If you violate this rule, the performance of the server might be
adversely affected. For DIMM socket population rules, see DIMM Population Rules.
Prepare the server for warm service.
See Preparing the Server for Component Replacement.
This procedure can also be completed as a cold service
Access DIMMs as required.
If you are changing or adding DIMMs as part of an upgrade, ignore
the fault identification instructions.
Locate the DIMM slot.
Install a DIMM.
Ensure that the ejector tabs are in the open position.
Align the notch in the replacement DIMM with the connector key
in the connector socket.
The notch ensures that the DIMM is oriented correctly.
To align the DIMM in the slot, ensure that the notch on the
DIMM connector lines up with the key in the DIMM slot.
Push the DDR4 DIMM into the connector socket until the ejector
tabs lock the DIMM in place.
If the DIMM does not easily seat into the connector socket,
verify that the notch in the DIMM is aligned with the connector
key in the connector socket. If the notch is not aligned, damage
to the DIMM might occur.
To install the DIMM in the slot, simultaneously press down on both
edges of the DIMM.
This action forces the DIMM into the slot and causes the two slot
levers to rise and lock the DIMM in the slot.
Verify that the DIMM sits evenly in the slot and is locked.
Both levers should be in their fully closed and vertical position. In
this position the levers lock the DIMM in the slot.
Install the CMOD cover.
See Install the CMOD Cover.
Install the CMOD.
See Install a CMOD.
(Optional) Use Oracle ILOM to clear server DDR4 DIMM faults.
DDR4 DIMM faults are automatically cleared after a new DIMM has been
installed. If you need to manually clear DDR4 DIMM faults, refer to the
Oracle Integrated Lights Out Manager (ILOM) 4.0 Documentation Library at
If you want to move a faulty DDR4 DIMM to a new DIMM socket or
re-seat a DIMM for troubleshooting, you must first manually clear
the associated DIMM fault. Otherwise, the DIMM fault might follow
the DIMM to the new socket location or reoccur on the current socket
location, causing a false DIMM fault condition.