Does this power supply come with any warranty, and if so, what does it cover?

The product ships with a minimum 90-day warranty.

Is this Dell 255w power supply compatible with other Dell Optiplex models besides the 760 and 960?

Yes, the Dell 255W power supply is compatible with Optiplex models 580, 760, 780, 960, and 980.

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genuine dell 255w power supply psu for the optiplex 760 and 960 desktop system. rm110, fr597, cy826, wu123, f255e-01, d255p-00

This Certified Refurbished product is tested and certified to look and work like new. The refurbishing process includes functionality testing, basic cleaning, inspection, and repackaging. The product ships with all relevant accessories, a minimum 90-day warranty, and may arrive in a generic box. Only select sellers who maintain a high performance bar may offer Certified Refurbished products on
Genuine Dell 255W Replacement Power Supply
255 Watt Max Output | 100- 240V Input | Compatible with:Optiplex 580, 760, 780, 960, and 980 Desktop Systems
Compatible Dell Part Numbers:RM110, FR597, CY826, WU123, T164M, N249M, C112T, D390T, F283T, G238T, V6V76
Model Numbers: F255E-01, D255P-00, L255P-01, AC255AD-00, H255E-01 Reference Numbers: DPS-255BB A, PS-5261-3DF1-LF, VP09500052-00, HP-D2553A0