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Compact SFX power supply unit with 24-pin ATX connector and black finish

Ruth's sister

Ruth's sister SFX400 400W internal power cable

SKU CH-0AX6-PMTKG

A 400 W SFX power supply with active PFC, 24-pin ATX, 8-pin CPU and GPU connectors, plus three SATA ports

  • Delivers 400 W continuous power with 500 W peak for demanding builds
  • Active PFC and up to 90 % efficiency cut energy waste
  • 24-pin ATX plus 8-pin CPU and 8-pin GPU connectors cover core components
  • Three SATA power plugs support multiple drives
  • 450 mm main cable length eases routing in compact SFX cases

SFX400 400W power supply

This SFX400 unit delivers a rated 400W output with a 500W peak capacity for small-form-factor desktop builds. It uses a non-modular design with a 450mm main cable and a 20+4 pin ATX connector. The power supply suits builders assembling compact systems that need standard ATX connectivity.

Active PFC with temperature-controlled cooling

Active PFC operates across a 90V to 264V input range and achieves up to 90% conversion efficiency. Standby power remains below 1W. An 8cm fan provides temperature-controlled cooling to manage thermals and noise during normal operation.

Replaces lower-wattage SFX units

This power supply upgrades older SFX units that cannot support modern 8-pin GPU and CPU connectors. The jump is worthwhile when a build requires three SATA drives, dual 4-pin peripherals, and 8-pin CPU and GPU power simultaneously. It does not suit systems needing modular cables or higher continuous wattage.

Highlights

  • Delivers 400 W continuous power with 500 W peak for demanding builds
  • Active PFC and up to 90 % efficiency cut energy waste
  • 24-pin ATX plus 8-pin CPU and 8-pin GPU connectors cover core components
  • Three SATA power plugs support multiple drives
  • 450 mm main cable length eases routing in compact SFX cases

Specifications

No published specifications for this item yet.

Questions about this item

How do I route the 450 mm main cable to the 20+4 pin motherboard connector in a compact SFX build?

Feed the 450 mm 20+4 pin cable behind the motherboard tray first, then bend it at the 24 pin plug to avoid blocking the 80 mm fan intake.

When should I check the 80 mm temperature-controlled fan for dust buildup?

Inspect the 80 mm fan every 12 months; active PFC and 90 percent efficiency keep heat low, but restricted airflow raises internal temperatures.

What happens if my system draws more than 400 W continuously?

The unit peaks at 500 W; sustained loads above 400 W trigger over-temperature protection and shut the supply down.

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