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This 300W TFX switching power supply is a perfect aftermarket substitute for original Power Man & In-Win PSU models IP-S300FF1-0, IP-S300EF7-2, IP-P300DF1-0 and IP-P300DF7-2, widely applicable to Dell small form factor SFF desktop chassis as an upgrade or faulty PSU replacement. Adopted premium internal components following TFX12V industrial specification, it delivers consistent stable 300W power for daily office and basic home desktop configuration. Equipped with factory-matched full cable harness, plug-and-play installation without chassis modification or extra adapter needed. Intelligent temperature-adjustable cooling fan automatically regulates fan speed to balance working noise and cooling efficiency. Comprehensive built-in safety circuitry shields motherboard, CPU and storage drives against abnormal power fluctuation, an economical reliable replacement solution for broken original small chassis power supply.