Dell N249M 255W OptiPlex DT Power Supply

Genuine Dell N249M 255-WATT internal power supply for configuration-specific OptiPlex desktop-form-factor systems. Dell community documentation identifies N249M as a proprietary 255-WATT supply for the OptiPlex 760/960/980 DT family, while exact-part references also name selected OptiPlex 780 DT configurations. Those systems use a desktop chassis distinct from SFF, USFF, and MT variants. Related OEM model numbers and Dell part numbers remain identification clues only. Power cord, mounting hardware, adapters, and accessories are not assumed included. This inventory record explicitly identifies the condition as New. Match N249M exactly, complete OEM model/revision, service tag, exact DT chassis, 255-WATT label, input/output ratings, dimensions, mounting pattern, every connector, cable lengths, pinout, and included items before ordering.

Key Specifications

• Manufacturer: Dell; verify actual OEM label
• Dell Part Number: N249M; verify complete label
• Rated Output: 255 W
• Form Factor: Dell desktop chassis; not SFF, USFF, or MT
• Reported Systems: Selected OptiPlex 760 / 780 / 960 / 980 DT configurations
• Connector Warning: Dell documents the design as proprietary; verify actual connector layout and pinout
• Compatibility Warning: Related 255W model numbers and Dell parts do not prove interchangeability
• Condition: New

Compatible Models

• Dell OptiPlex DT configurations whose original supply specifies N249M; verify service tag, exact desktop chassis, OEM model/revision, dimensions, connectors, cable lengths, and pinout