Part 102839 is an internal ATX power supply listed in eMachines inventory data as a Grantsdale 300W dual-12V supply and cross-referenced with HiPro model HP-P3087F3. Exact-model references commonly label HP-P3087F3 at 305W maximum, so the 300W catalog description and 305W model rating are retained as related values that must be reconciled against the physical label. Similar Gateway numbers such as 102015 and 6500914 appear in model-family references but are clues only. This inventory record identifies the condition as New. No computer, AC cord, adapter, or mounting hardware is assumed included. Match 102839 and HP-P3087F3 exactly and verify the original eMachines/Gateway model, every label, wattage and input, 24-pin and all auxiliary connectors, pinout, cable lengths, mounting, fan orientation, and included contents before installation.