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Rectangular black ATX power supply unit with cooling fan visible

KHACHIMO

KHACHIMO R5 850W Power Supply HU850EF-00 48Y6D

SKU CH-YPA8-NM7S9

850W ATX power supply with 80 PLUS Gold efficiency, Zero RPM fan mode for silent low-load operation and Modern Standby compatibility

  • TypeATX
  • Faster wake-from-sleep with Modern Standby support
  • 80 PLUS Gold efficiency cuts power draw and heat
  • Fan stays off at low loads for silent running
  • Resonant LLC and DC-to-DC deliver stable, clean power
  • ATX form factor fits standard desktop builds

850W ATX Power Supply for Modern Standby Systems

This KHACHIMO R5 unit delivers 850W of continuous power through an ATX form factor. It is built for PCs that use Modern Standby sleep states and need efficient, low-noise operation. The 80 PLUS Gold certification confirms high efficiency across typical loads.

Sustained-load behaviour with LLC resonant topology

The resonant LLC topology with DC-to-DC conversion maintains clean, consistent power during extended work sessions. It supports energy-efficient sleep states without voltage drift and reduces coil whine that can appear under constant demand. Efficiency stays high so waste heat does not accumulate over time.

Thermals, noise and power draw in normal use

Zero RPM fan mode stops the fan completely at low and medium loads for near-silent running. The 80 PLUS Gold rating means lower power consumption and cooler temperatures during everyday tasks. Modern Standby compatibility adds extremely fast wake times while keeping idle draw minimal.

Highlights

  • Faster wake-from-sleep with Modern Standby support
  • 80 PLUS Gold efficiency cuts power draw and heat
  • Fan stays off at low loads for silent running
  • Resonant LLC and DC-to-DC deliver stable, clean power
  • ATX form factor fits standard desktop builds

Specifications

TypeATX

Questions about this item

How loud does the 850W unit get when it runs all day under load?

The Zero RPM Fan Mode stops the fan completely at low and medium loads for near-silent operation, while 80 PLUS Gold efficiency keeps waste heat and noise lower at higher loads.

Which cables or connectors must my build already have to use this PSU?

It follows the ATX form factor, so your case needs an ATX PSU mounting space and your motherboard requires standard 24-pin ATX and CPU power headers.

Will the HU850EF-00 work reliably with an older motherboard that lacks Modern Standby support?

Yes, the Resonant LLC topology with DC-to-DC conversion delivers clean power to any ATX-compatible board, and Modern Standby features simply remain inactive on legacy platforms.

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