Dell Power Supply 255W (M9GW7)

Keep your Dell OptiPlex small form factor desktop running with this 255W power supply. It's a direct replacement for the original unit in OptiPlex 3010 SFF, 7010 SFF, 9010 SFF, 390 SFF, 790 SFF, and 990 SFF models, and it's also compatible with other Dell systems that use the same proprietary form factor. The active fan keeps it cool under load, and the 80 PLUS Bronze efficiency means less wasted energy and lower heat output. With a full set of protection features, it's built to deliver stable power for years.

Key specifications

• Total power output: 255 W
• Form factor: Small Form Factor (SFF) proprietary
• Input voltage: 100-240 VAC
• Input frequency: 50/60 Hz
• Main power connector: 1x 8-pin ATX (proprietary Dell)
• CPU power connector: 1x 4-pin ATX
• SATA power connectors: 3
• Efficiency rating: 80 PLUS Bronze
• +12V rail output: 18 A
• +5V rail output: 15 A
• +3.3V rail output: 15 A
• -12V rail output: 0.5 A
• +5Vsb rail output: 2 A
• Cooling: Active fan
• Protection features: Over Voltage Protection (OVP), Over Power Protection (OPP), Short Circuit Protection (SCP)
• Alternative part numbers: 0M9GW7, H255ES-00, L255ES-00, D255ES-00

Why choose it

This power supply is a genuine Dell replacement part, ensuring a perfect fit and reliable operation. The 80 PLUS Bronze certification means it meets strict efficiency standards, reducing electricity costs and heat. The active cooling fan adjusts to load, keeping noise down when possible. Protection circuits guard against common electrical issues, protecting your system's components.

Ideal use cases

• Replacing a failed or failing power supply in a Dell OptiPlex SFF desktop
• Upgrading to a more efficient unit for lower energy consumption
• Keeping a spare on hand for quick repairs in office environments
• Refurbishing or building a compact Dell-based system

Good to know

This power supply is specifically designed for Dell small form factor cases; it is not a standard ATX size. Check your system's compatibility before ordering. The unit includes the necessary proprietary connectors for Dell motherboards.