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Rectangular silver ATX power supply unit with rear fan grille and side label

KHACHIMO

KHACHIMO 400W ATX Power Supply HG2-5400V

SKU CH-7SZF-97794

An 80 PLUS Gold certified 400W ATX power supply with Modern Standby support, Zero RPM fan mode and LLC resonant topology for quiet, efficient power

  • TypeATX
  • Modern Standby support enables faster wake-from-sleep and improved low-load efficiency
  • 80 PLUS Gold certification delivers high efficiency for lower power draw and cooler running
  • Zero RPM fan mode stops the fan at low and medium loads for near-silent operation
  • Resonant LLC topology with DC-to-DC conversion provides clean power and reduces coil whine
  • 400W ATX output supplies reliable power for standard desktop builds

400W ATX Power Supply

The KHACHIMO HG2-5400V is an ATX switching power supply rated at 400W. It targets system builders who need a Gold-efficiency unit for mainstream desktop configurations. Its Modern Standby compatibility suits PCs that rely on fast wake-from-sleep behaviour. It is not intended for high-end multi-GPU workstations or servers that demand significantly higher output capacity.

80 PLUS Gold Thermals

80 PLUS Gold certification confirms high efficiency during normal operation, which reduces power draw, waste heat and acoustic output. The Zero RPM fan mode stops the cooling fan completely at low and medium loads for near-silent running. Resonant LLC topology with DC-to-DC conversion further lowers coil whine and supports efficient sleep states. No liquid-cooling provisions or external thermal controls are included.

Modern Standby & Topology

Modern Standby compatibility enables extremely fast wake times and improved low-load efficiency for compatible operating systems. The resonant LLC design with DC-to-DC conversion delivers clean, consistent power across the rails while minimising electrical noise. These features replace legacy group-regulated layouts but do not add modular cabling, RGB lighting or software monitoring utilities.

Points forts

  • Modern Standby support enables faster wake-from-sleep and improved low-load efficiency
  • 80 PLUS Gold certification delivers high efficiency for lower power draw and cooler running
  • Zero RPM fan mode stops the fan at low and medium loads for near-silent operation
  • Resonant LLC topology with DC-to-DC conversion provides clean power and reduces coil whine
  • 400W ATX output supplies reliable power for standard desktop builds

Caractéristiques

TypeATX

Questions sur cet article

How do I install this 400W ATX power supply and which step is often missed?

Secure the unit in the chassis with four screws, connect the 24-pin ATX and 4+4 pin CPU cables to the motherboard, then attach PCIe power to the graphics card; the step most builders miss is fully seating the 4+4 pin CPU connector near the socket.

What maintenance will this 400W ATX unit need later?

The Zero RPM Fan Mode keeps the fan off at low and medium loads, reducing dust intake; clean the intake grill with compressed air once a year and replace the unit if coil whine appears or efficiency drops below 80 PLUS Gold levels.

What limit appears first on this 400W ATX supply under sustained load?

The 400W continuous output ceiling is reached before thermal limits; the Resonant LLC topology with DC-to-DC conversion maintains tight regulation up to that point, and the 80 PLUS Gold rating ensures efficiency stays high near maximum load.

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