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Rectangular silver ATX power supply with fan grille and power switch

KHACHIMO

KHACHIMO AT P8P9 With Switch 400W Switching Power Supply

SKU CH-XRA2-Y4AFQ

ATX power supply with 80 PLUS Gold efficiency, Zero RPM fan mode, Modern Standby support and 400W output

  • TypeATX
  • Modern Standby gives near-instant wake from sleep
  • 80 PLUS Gold certification cuts power draw and heat
  • Zero RPM fan mode keeps the unit silent at low loads
  • Resonant LLC with DC-to-DC topology delivers stable, clean power
  • 400 W ATX output supports standard desktop builds

400 W ATX power supply with Modern Standby

This 400 W ATX power supply targets builders who want efficient, quiet power for mainstream desktop systems. It supports Modern Standby for rapid wake-from-sleep behaviour and carries 80 PLUS Gold certification. The unit suits general-purpose workstations and home PCs rather than high-end multi-GPU rigs.

Gold efficiency and zero-RPM fan profile

At typical loads the 80 PLUS Gold rating keeps waste heat and power draw low while the resonant LLC topology with DC-to-DC conversion delivers clean voltage rails. A zero-RPM fan mode stops the cooling fan completely at low and medium loads, cutting audible noise to near-silent levels. Coil whine is also reduced by the resonant design.

Compact ATX form factor with standard connectors

The supply fits regular ATX chassis and provides the usual motherboard, CPU and peripheral connectors for straightforward installation. Modern Standby compatibility means the PC can enter deeper sleep states without losing responsiveness. Builders needing more than 400 W or auxiliary PCIe cables for multiple graphics cards should look at higher-capacity models.

Highlights

  • Modern Standby gives near-instant wake from sleep
  • 80 PLUS Gold certification cuts power draw and heat
  • Zero RPM fan mode keeps the unit silent at low loads
  • Resonant LLC with DC-to-DC topology delivers stable, clean power
  • 400 W ATX output supports standard desktop builds

Specifications

TypeATX

Questions about this item

How do I install the ATX unit and what step is often missed?

Mount the supply in the case with four screws, connect the 24-pin ATX, CPU and peripheral cables, then flip the rear AC switch on — the step people skip is verifying that the main power cable is fully seated before closing the case.

What maintenance or replacement will the 400W unit need later?

The Zero RPM fan may accumulate dust; clean the intake grill periodically and replace the fan if bearing noise appears after years of use.

What limit appears first under sustained load on this 80 PLUS Gold supply?

The 400W continuous power ceiling is reached before thermal limits; efficiency peaks near mid-load, so running above 300W for long periods increases heat and fan activity.

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