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ATX power supply unit with 120mm fan and 20+4-pin connector

Ruth's sister

Ruth's sister 400Ssa internal power cable

SKU CH-WMXE-WBNP9

Delivers up to 400 W through a 20+4-pin ATX connector with two SATA ports and a 120 mm fan

  • 400W peak power supports demanding desktop and server builds
  • Gold-rated efficiency reduces energy loss during operation
  • 120mm silent fan keeps temperatures low with minimal noise
  • 20+4-pin ATX connector fits standard motherboard power sockets
  • Two SATA ports provide power for storage drives

400 W ATX power supply for office and desktop builds

The Ruth's sister 400Ssa delivers a rated 250 W with a 400 W peak for standard desktop and server workloads. It uses a 20+4-pin ATX connector and a 4-pin CPU connector. Passive PFC and Gold 80 PLUS certification indicate baseline efficiency for everyday use.

Two SATA power connectors and fixed cable set

The unit includes two SATA power connectors and two D-type connectors for peripheral drives. All cables are permanently attached, so the full loom stays inside the case. A single 120 mm fan handles cooling across the non-modular harness.

Compact 15 × 14 × 8.6 cm steel chassis

The enclosure measures 15 by 14 by 8.6 centimetres and fits standard ATX mounting points. Input range covers 170 to 264 V for global mains compatibility. Builders needing more than two SATA devices or modular cabling should consider a different unit.

How it compares

Measured against everything we stock in Internal PSU & Riser Cables, at today’s prices. Recalculated every night.

Price $43.99
Pricier than about 81% of the 7,839 comparable items (median $14.99).

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Specifications

No published specifications for this item yet.

Questions about this item

Will the 120mm fan need replacement after long use?

The 120mm silent fan is the only moving part and may eventually require replacement if bearings wear out.

Which limit appears first when the unit runs at full load continuously?

The rated output is 250W; sustained loads above that level will hit the continuous power limit before the 400W peak rating.

How much heat and noise does the 120mm fan produce during all-day operation?

The 120mm silent fan is designed for low noise, and passive PFC with 80 PLUS Gold efficiency helps reduce waste heat during extended use.

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