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Compact 1U Flex-ATX PSU, matte metal casing, full modular cables visible

Ruth's sister

Ruth's sister FLEX-400 internal power cable

SKU CH-H292-JB219

A full-modular 350 W Flex-ATX supply with active PFC, 85 % efficiency and cables for SATA, CPU and graphics power

  • 350 W output powers small-form-factor builds
  • Full modular cabling reduces clutter inside the case
  • Active PFC improves power efficiency across 100-264 V input
  • 85 % efficiency rating lowers heat and energy waste
  • Flex-ATX 1U size fits compact ITX and server chassis

Flex-ATX 350W power supply

The Ruth's sister FLEX-400 is a 350W Flex-ATX power supply designed for compact 1U server chassis and small-form-factor ITX builds. Its full modular cabling lets you connect only the leads required for a clean internal layout.

400W peak output with active PFC

The unit delivers a maximum of 400W and incorporates active power factor correction across a 100-264V input range. This single rating determines whether the PSU can sustain your CPU and graphics card under load.

85% efficiency and 80K-hour life rating

Rated at 85% efficiency, the supply runs a 4020 PWM fan that adjusts speed with temperature. Each output includes over-voltage and short-circuit protection, and the design is validated for more than 80K hours of continuous operation.

How it compares

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

Price $90.99
Pricier than about 90% of the 7,693 comparable items (median $14.99).

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Specifications

No published specifications for this item yet.

Questions about this item

What does the 350 W rating mean for a small-form-factor build?

The unit is rated for 350 W continuous output, with a 400 W peak, so it can power typical ITX boards, a mid-range GPU and a few drives in a Flex-ATX chassis.

How does the 20+4 pin interface limit what I can connect?

The 20+4 pin main connector feeds the motherboard, while the full-modular design lets you attach only the 4-pin CPU, 6-pin GPU and SATA cables you need.

Will the 150×81.5×40 mm body fit my 1U rack case?

Yes, the 1U-height (40 mm) Flex-ATX form factor matches standard 1U server and ITX enclosures, and the 45 cm cables reach most motherboard headers.

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