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Black modular power supply unit with cables, 150 by 80 by 40 millimetres

Ruth's sister

Ruth's sister dps-400ab-12b internal power cable

SKU CH-JQQN-HH7XJ

Full modular 400 W server PSU with active PFC, two SATA ports, two 6-pin GPU connectors and 20+4-pin ATX interface

  • 400 W rated output powers server and desktop builds
  • Full modular design reduces cable clutter inside the chassis
  • Active PFC improves input efficiency across 264 V range
  • Two SATA ports and dual 6-pin connectors support drives and GPU
  • Compact 150 × 80 × 40 mm form factor fits 1U and ITX cases

Ruth's sister 400W Flex PSU

The Ruth's sister dps-400ab-12b is a 400 watt full modular power supply built for server and desktop use. It fits 1U chassis and ITX cases with a compact 150 by 80 by 40 millimetre form factor. Active PFC and a modified -12 volt rail aim to improve motherboard stability. The unit ships new in its original package.

20+4 pin main connector

The single specification that decides compatibility is the 20+4 pin ATX interface combined with a 4 pin CPU power connector and two SATA ports. Graphics power is delivered through two six pin connectors. Input voltage reaches 264 volts and peak output can exceed 500 watts. No 80 PLUS certification is claimed for this model.

Suits compact server and ITX builds

This supply suits builders who need a small 400 watt modular unit with a standard 20+4 pin motherboard connector and basic SATA or six pin GPU power. It is not for systems that require an eight pin CPU connector, more than two SATA devices, or a certified efficiency rating. Buyers needing higher wattage or different cable configurations should look elsewhere.

Highlights

  • 400 W rated output powers server and desktop builds
  • Full modular design reduces cable clutter inside the chassis
  • Active PFC improves input efficiency across 264 V range
  • Two SATA ports and dual 6-pin connectors support drives and GPU
  • Compact 150 × 80 × 40 mm form factor fits 1U and ITX cases

Specifications

No published specifications for this item yet.

Questions about this item

How much continuous power can the 400W rating deliver inside a server or ITX build?

The unit is rated for 400W continuous output and can peak above 500W, so a typical server or small-form-factor system drawing up to 400W will run within its steady-state capability.

What does the 20+4 pin interface limit in a desktop motherboard?

The 20+4 pin connector fits standard ATX motherboards and carries all main power rails; total draw is still capped by the 400W rating of the supply itself.

Will the 150×80×40 mm housing fit a 1U rack chassis?

At 40 mm tall the unit matches a 1U slot, and the 150 mm depth suits short-depth rack or ITX cases that accept a Flex-ATX form factor.

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