Installing Memory; Supported Dimms - Cisco UCS B420 M4 Installation And Service Note

Installing Memory

Step 8
Tighten the four captive screws in the order shown.
Installing Memory
To install a DIMM into the blade server, follow these steps:
Procedure
Step 1 Press the DIMM into its slot evenly on both ends until it clicks into place.
DIMMs are keyed. If a gentle force is not sufficient, make sure the notch on the DIMM is correctly aligned.
Note
Step 2
Press the DIMM connector latches inward slightly to seat them fully.

Supported DIMMs

The DIMMs supported in this blade server are constantly being updated. A list of currently supported and
available DIMMs is in the
Do not use any memory DIMMs other than those listed in the specification sheet. Doing so may irreparably
damage the server and require down time.
Memory Arrangement
The Cisco UCS B420 high-performance blade server contains 48 slots for installing DIMMs—12 for each
CPU. Each CPU has 12 DIMM slots spread over 4 channels. This blade server needs at least one DIMM
attached to all populated CPUs. DIMMs installed in slots for an absent CPU will not be recognized. For
optimal performance, distribute DIMMs evenly across all CPUs. DIMM connector latches are color coded
blue, black, and white, and the DIMMs must be installed in that order.
Cisco UCS B420 M4 Blade Server Installation and Service Note
24
Be sure that the notch in the DIMM aligns with the slot. If the notch is misaligned you may damage
the DIMM, the slot, or both.
Cisco UCS B420 M4 Blade Server Specification
Servicing the Blade Server
Sheet.