Dimm Replacement Procedure - Cisco UCS C24 Installation And Service Manual

Chapter 3 Maintaining the Server
Table 3-4
Number of DIMMs 
per CPU
2
4

DIMM Replacement Procedure

To install a DIMM assembly, follow these steps:
Remove the DIMMs that you are replacing:
Step 1
a.
b.
Caution If you cannot safely view and access the component, remove the server from the rack.
c.
d.
e.
f.
Step 2 Install a new DIMM:
Note
a.
b.
c.
d.
e.
f.
OL-26647-01z
Memory Mirroring DIMM Population, Two CPUs
CPU 1 Population
A0; B0
A0, B0; A1, B1
Power off the server as described in the
page 3-6.
Slide the server out the front of the rack far enough so that you can remove the top cover. You might
have to detach cables from the rear panel to provide clearance.
Remove the top cover as described in
page 3-7.
Remove PCIe riser 1 to provide clearance and set it aside on an antistatic surface (see
PCIe Riser, page 3-29).
Remove the plastic air baffle that covers the DIMM slots and CPUs.
Open the ejector levers at both ends of the DIMM slot, then lift the DIMM out of the slot.
Before installing DIMMs, refer to the population guidelines. See
Guidelines and Population Rules, page
Align the new DIMM with the empty slot on the motherboard. Use the alignment key in the DIMM
slot to correctly orient the notch on the bottom edge of the DIMM.
Push down evenly on the top corners of the DIMM until it is fully seated and the ejector levers on
both ends lock into place.
Replace the plastic air baffle over the DIMM slots.
Replace PCIe riser 1 to it slot. See
Replace the top cover.
Replace the server in the rack, replace cables, and then power on the server by pressing the Power
button.
CPU2 Population
D0; E0
D0, E0; D1, E1
"Shutting Down and Powering Off the Server" section on
"Removing and Replacing the Server Top Cover" section on
3-18.
Replacing a PCIe Riser, page
Cisco UCS C24 Server Installation and Service Guide
Installing or Replacing Server Components
Replacing a
Memory Performance
3-29.
3-21