Specifications

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3-23
Cisco UCS C460 Server Installation and Service Guide
OL-22326-01z
Chapter 3 Maintaining the Server
Installing or Replacing Server Components
Replacing Memory Risers
The memory risers connect to the motherboard and each riser provides eight DIMM slots. The memory
riser is hot-swappable when you use the Attention button, as described in the following procedure.
Figure 3-16 Memory Riser LEDs (Top View)
To replace or install a hot-swappable memory riser, follow these steps:
Step 1 Remove the memory riser that you are replacing: See Figure 3-17:
a. Slide the server out the front of the rack far enough so that you can remove the top cover.
b. Remove the top cover as described in “Removing and Replacing the Server Top Cover” section on
page 3-7.
c. Press the attention button (ATTN BUTTON) on the top of the memory riser (see Figure 3-16).
d. Wait until the attention LED (ATTN) and the power LED turn off.
e. Simultaneously press both green release buttons on the top of the memory riser to release the riser
retaining latches. The latches open up to a 45-degree angle when they are released.
f. Grasp the open retaining latches and lift the memory riser straight up and out of the motherboard
connector.
g. If you are installing or replacing DIMMs on the memory riser, use the instructions in Replacing
DIMMs, page 3-25.
Step 2 Install (hot-add) a new memory riser:
a. Ensure that the riser release latches are in the open position.
a. Align the riser with the empty motherboard connector.
b. Push the riser into the connector until it is seated and the open release levers engage.
c. Simultaneously press down on each release lever to put them in the locked position. This ensures
that the riser is properly seated in the motherboard connector.
d. Press the attention button, then wait until the attention LED turns off.
1 Attention button (used for hot-swapping and
hot-adding)
2 Attention LED (indicates when hot-swapping
is safe)
3 Power LED (indicates whether the riser has
power)
4 Mirror activity LED (indicates whether
memory mirroring is enabled)
5 DIMM fault LEDs 1 through 8
(indicate which DIMM has failed)
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1 5
2
3
4