The Dell Poweredge R920 can hold up to 4 power supplies. The spare power supplies come in Hot-plug redundant PSUs: 750W AC, 1100W AC and DC options. Make sure you are replacing or adding an additional power supply that matches the wattage of the current power supply installed. Always replace with a genuine Dell power supply specifically engineered for the Dell Poweredge R920. If you are receiving the error message Dell Poweredge R920 power required exceeds PSU wattage you should look at installing the largest wattage power supplies. If you are currently using the largest wattage Poweredge R920 power supply you will want to try replacing them. One of the power supplies could be causing the Poweredge R920 to have a wattage error.
If we are not showing stock contact us at 952-831-1032 as we most likely have in servers that we can pull the power supply from.