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Rectangular metal ATX power supply unit with fan grille and cable bundle

KHACHIMO

KHACHIMO 400W 80 PLUS Gold ATX power supply

SKU CH-4YXY-N10YH

An ATX power supply delivering 400W with 80 PLUS Gold efficiency, zero-RPM fan mode for silent low-load operation, and Modern Standby compatibility for fast wake times

  • TypeATX
  • 80 PLUS Gold certification cuts electricity use and heat
  • Zero RPM fan mode keeps the system silent at low loads
  • Resonant LLC with DC-to-DC delivers clean, stable power
  • Modern Standby support enables instant wake from sleep
  • 400 W output powers compact ATX builds reliably

Compact 400W ATX supply for small-form-factor builds

This KHACHIMO unit delivers 400 watts through a standard ATX form factor, making it suitable for compact desktops and workstations such as the Z230 SFF. The 80 PLUS Gold rating ensures high efficiency across typical loads, reducing both electricity draw and waste heat inside tight chassis.

Sustained load behavior with LLC resonant topology

Under continuous demand the resonant LLC design with DC-to-DC conversion maintains tight voltage regulation and low ripple, keeping output stable during long compute or rendering sessions. The topology also supports deeper sleep states, so the system transitions in and out of Modern Standby without voltage sag or overshoot.

Build cues from connectors and mounting

A single 6-pin PCIe connector is provided, limiting the unit to graphics cards that draw no more than the slot plus one auxiliary feed. The Zero RPM fan mode stops the fan completely at low and medium loads, offering near-silent operation for office or media-centre use, while the ATX mounting pattern fits standard screw holes in small-form-factor cases.

Highlights

  • 80 PLUS Gold certification cuts electricity use and heat
  • Zero RPM fan mode keeps the system silent at low loads
  • Resonant LLC with DC-to-DC delivers clean, stable power
  • Modern Standby support enables instant wake from sleep
  • 400 W output powers compact ATX builds reliably

Specifications

TypeATX

Questions about this item

How much fan noise should I expect from the 400W unit when it runs all day at typical loads?

The Zero RPM Fan Mode stops the fan entirely at low and medium loads, so the PSU runs silently for most daily workloads.

Which power connectors must my motherboard and graphics card already provide for this ATX supply to work?

It uses a standard 24-pin ATX connector, a 4+4-pin CPU connector, and includes a 6-pin PCIe connector for discrete graphics cards.

Will the DC-to-DC topology and Modern Standby support cause issues if I keep an older motherboard without those sleep states?

The resonant LLC topology with DC-to-DC conversion delivers clean power regardless of the motherboard's sleep capabilities, so legacy boards work without problems.

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