1600W Platinum ATX Supply Uses Nine Polycap RT Solid Capacitors on Its 133A 12V Rail
2026-09-29 · Compiled by Best IT Parts from public industry reporting
Huntkey's MVP P1600X, model HK1K6-51PG, is a 1600W fully modular ATX supply carrying 80 PLUS Platinum certification, with 115-240Vac input, a +12V rail rated 133A and +5V and +3.3V rails at 30A each. Internally it uses active PFC, half-bridge LLC resonance, synchronous rectification and DC-DC conversion, with the modular daughter board soldered vertically at the output side of the PCBA. The unit ships with a full set of modular cables, documentation, cable ties and a cable comb.
A teardown of the 12V output stage shows the detail that matters at this current level. Beneath the synchronous-rectifier heatsink, a row of red solid capacitors runs along the board edge; nine Polycap RT series solid aluminium electrolytics of 2200uF 16V are fitted there for 19,800uF of nominal capacity. The RT series covers 6.3V to 100V and 22uF to 4700uF, with a 2000-hour DC load life at 105 degrees C, ultra-low equivalent series resistance and high ripple-current capability.
Running nine parts in parallel raises total capacity and splits ripple current across the bank, lowering combined ESR so each capacitor generates less heat under sustained load and fast load steps. On the buck daughter board, two Polycap RS series 470uF 16V solid capacitors filter the input of the 3.3V and 5V step-down rails. For a 1600W platform pushing 133A on a single 12V rail, ripple-current rating, load-step response and thermal aging behaviour carry more weight than the capacitance figure alone.
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Technical details are reproduced as reported. Verify specifications against the original source before design or procurement decisions.