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Rectangular 1U ATX power supply, matte black metal casing, rear fan grille, side label with model HK500-11UEPA and 400W rating

KHACHIMO

KHACHIMO HK500-11UEPA 400W 80 PLUS Gold ATX power supply

SKU CH-E6TK-GN5J3

A 400W ATX power supply with 80 PLUS Gold efficiency, zero-RPM fan mode and Modern Standby support for fast, quiet wake-ups

  • TypeATX
  • Modern Standby support for fast wake-from-sleep and better low-load efficiency
  • 80 PLUS Gold certification for lower power draw, less noise 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 delivers clean power and reduces coil whine
  • 400 W ATX power supply in a compact 1U form factor

1U 400W ATX Gold Power Supply

The KHACHIMO HK500-11UEPA is a 400 watt ATX power supply built in a 1U form factor. It targets system builders who need an 80 PLUS Gold unit for compact chassis or rackmount enclosures. Modern Standby compatibility allows extremely fast wake-from-sleep times and improved low-load efficiency. The resonant LLC topology with DC-to-DC conversion delivers clean, consistent power while reducing coil whine.

400W Output Limit and 1U Physical Constraint

The unit provides a maximum of 400 watts, so it suits modest single-GPU or integrated-graphics builds rather than high-end multi-GPU configurations. Its 1U height restricts installation to cases or server racks designed for that specific form factor. The Zero RPM fan mode stops the fan at low and medium loads for near-silent operation, but airflow still depends on the host chassis design. No other output ratings or connector counts are specified.

Verify Chassis Clearance and Power Requirements

Before ordering, confirm your case or rack accepts a 1U power supply and that the ATX connector layout matches your motherboard. Ensure the 400 watt capacity covers the peak draw of your CPU, graphics card, and all peripherals combined. Check that the supplied cables reach every component in your specific layout. No dimensions, weight, or detailed cable list are provided in the data.

Highlights

  • Modern Standby support for fast wake-from-sleep and better low-load efficiency
  • 80 PLUS Gold certification for lower power draw, less noise 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 delivers clean power and reduces coil whine
  • 400 W ATX power supply in a compact 1U form factor

Specifications

TypeATX

Questions about this item

Is the 400W 80 PLUS Gold model the right choice for a compact 1U build?

The HK500-11UEPA is a 400W ATX unit with 80 PLUS Gold efficiency, designed for 1U form-factor systems where space and thermal limits are tight.

What does the 80 PLUS Gold rating deliver in daily use?

It guarantees high efficiency across typical loads, lowering power draw, reducing heat output, and allowing the fan to stay off longer under light demand.

How does the ATX interface limit what I can connect in a 1U chassis?

Standard ATX connectors fit the unit, but cable routing space in a 1U case is restricted; plan cable lengths and connector clearance before installation.

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