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SFX power supply unit with 8 cm fan and sleeved cables

Ruth's sister

Ruth's sister SFX400 internal power cable

SKU CH-K2MG-NWFPS

A 400 W SFX power supply with an 8 cm temperature-controlled fan, active PFC and a 450 mm main cable for compact desktop builds

  • 400 W rated power handles demanding desktop builds
  • Active PFC improves efficiency across 90–264 V input range
  • 20+4 pin main connector fits standard ATX motherboards
  • Three SATA connectors power multiple drives and peripherals
  • 8-pin CPU and GPU plugs support modern graphics cards

SFX400 400 W power supply for small-form-factor

This SFX400 unit delivers a rated 400 W with a 500 W peak for compact desktop builds. It uses an 80 mm temperature-controlled fan and active PFC across a 90 V to 264 V input range. The non-modular design suits ITX cases where space is limited.

Fixed cables with 450 mm main lead

All connectors are permanently attached so there are no modular sockets to route. The 20 + 4 pin motherboard cable, 8 pin CPU cable, 8 pin GPU cable, two 4 pin peripheral cables and three SATA connectors share a 450 mm main cable length. Builders must plan cable paths before mounting the unit in tight chassis.

400 W continuous with 500 W peak headroom

The supply handles typical mid-range graphics cards and multi-core CPUs within its 400 W continuous rating. Peak loads up to 500 W are available for short bursts during heavy gaming scenes. Systems with multiple high-power GPUs or extensive drive arrays will exceed the available connectors and wattage.

How it compares

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

Price $56.99
Pricier than about 85% 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

How can I confirm the SFX400 is working correctly after installation?

The unit powers on when the 20+4 pin main connector and 8 pin CPU connector are seated, the 8 cm fan spins under temperature control, and the system posts without shutdowns under load.

What cables and connectors come attached to the SFX400?

Fixed cables include a 450 mm 20+4 pin main connector, an 8 pin CPU connector, one 8 pin GPU connector, two 4 pin D-type connectors, three SATA connectors and one small 4 pin connector.

Which capacity should I choose for a compact desktop build?

The SFX400 delivers a rated 400 W with a 500 W maximum peak, suited for mini-ITX systems requiring an SFX form factor.

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