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SS-500L1U Active PFC | Seasonic 500W PC Power Supply, 100 → 240V ac Input, -12 V, 3.3 V, 5 V, 5 Vsb, 12 (Combined) V Output | RS
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power supply - How does the 3.3V output work in this PSU circuit? - Electrical Engineering Stack Exchange
Of what use is the -5volt and -12volt generated by the power supply unit within the system unit? - Quora
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