For IBM Lenovo ThinkCentre M58 desktop computers, a 280-watt power supply is included. It is an effective power source that can deliver sufficient power for even the most demanding applications. The Energy Star certification of the 41J9419 - IBM Lenovo 280-Watts Power Supply for ThinkCentre M58 confirms that it complies with stringent energy efficiency requirements. Your energy bills could be reduced as a result. Additionally, short circuit, overcurrent, and overvoltage protection are included with the power supply. When a power surge or other electrical anomaly occurs, these features assist shield your computer from damage.