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Compact SFX power supply unit with matte black finish and integrated cables

Ruth's sister

Ruth's sister SFX400 Update Version Small Rated Platinum 110V 220v Mute Small internal power cable

SKU CH-WK46-79Q8N

SFX form-factor 400 W PSU with Platinum-rated efficiency, active PFC, 20+4-pin ATX, 8-pin CPU, dual 6-pin GPU and three SATA connectors

  • 400 W rated output handles demanding desktop builds
  • 500 W maximum peak covers transient load spikes
  • 90 % conversion efficiency reduces waste heat and power draw
  • Active PFC corrects power factor for cleaner AC input
  • Universal 100-240 V input works worldwide without a switch

SFX 400 W Platinum Power Supply

This SFX form-factor unit delivers a rated 400 W with a 500 W peak for compact desktop builds. It carries an 80 PLUS Platinum-level efficiency rating and active PFC for low standby draw. The non-modular cable set keeps the wiring simple inside space-constrained chassis.

Fits ITX Cases With 20+4 Pin Main Connector

The 20+4 pin ATX connector plugs directly into standard motherboards while the 4+4 pin CPU cable reaches the processor socket. Two 6-pin PCIe leads and three SATA connectors power a discrete graphics card and storage drives. Universal 100-240 V input works worldwide without a voltage switch.

400 W Continuous With 500 W Peak Headroom

Continuous output of 400 W handles mid-range graphics cards and multi-core processors in small-form-factor systems. The 500 W peak absorbs transient spikes during heavy gaming loads. Builds requiring more than two PCIe power cables or higher sustained wattage will exceed this unit's capacity.

How it compares

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

Price $53.99
Pricier than about 84% 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

At what load does the 400 W SFX unit hit its efficiency ceiling during long sessions?

The 80 PLUS Platinum rating guarantees up to 90 % conversion efficiency at typical loads, so sustained output near 400 W stays within that ceiling.

How loud and hot does the 8 cm temperature-controlled fan get after hours of continuous operation?

The 8 cm fan runs under temperature control, ramping only as needed to keep internal heat in check during all-day use.

Which motherboard and graphics-card connectors must my build already provide for this non-modular SFX supply?

The fixed harness includes a 20+4 pin main connector, an 8-pin (4+4) CPU plug, two 6+2 pin GPU leads, three SATA plugs and two 4-pin peripheral headers.

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