Cisco UCS C240 M3 High-Density Rack Server (Small Form Factor Disk Drive Model)
CONFIGURING the SERVER
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STEP 8 ORDER POWER SUPPLY
The C240 M3 server requires one power supply. A lightly loaded server may require one or two 
650 W power supplies. A fully loaded server might need to be powered with two 1200 W power 
supplies (see 
Table 12). Use the power calculator at the following link to determine the needed 
power based on the options chosen (CPUs, drives, memory, and so on):
https://express.salire.com/Go/Cisco/Cisco-UCS-Power-Calculator.aspx
Table 12    Power Supply 
Product ID (PID) PID Description
UCSC-PSU-650W  650 W power supply (CSCI platinum).
UCSC-PSU2-1200 1200 W power supply (CSCI platinum).
NOTE:  In a two power supply server, both power supplies must be identical.