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This single-pack aftermarket 500W switching power supply is manufactured strictly per Dell original industrial specifications, designed to replace defective factory PSU for listed Optiplex, Vostro, XPS and Precision T3660 tower desktops. 80 Plus Platinum high-efficiency design lowers idle power consumption to reduce long-term electricity expense. Standard SFX form factor and consistent OEM cable layout enable seamless direct swap of faulty original power unit, ideal replacement spare for computer repair stores, enterprise bulk IT maintenance and personal PC upgrade refurbishment projects.