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Rectangular ATX power supply unit in matte black finish with ventilation grille and fan visible

KHACHIMO

KHACHIMO R515 R525 770W ATX Power Supply AC-066A

SKU CH-M1YJ-69M22

An ATX power supply delivering 770 W with 80 PLUS Gold efficiency, Modern Standby support, a Zero RPM fan mode for silent low-load operation.

  • TypeATX
  • Modern Standby gives extremely fast wake-from-sleep times
  • 80 PLUS Gold certification lowers power draw and heat
  • Zero RPM fan mode stops the fan at low loads for near-silent use
  • Resonant LLC with DC-to-DC conversion delivers clean power and reduces coil whine
  • ATX form factor fits standard desktop cases

ATX 770W for modern builds

This ATX power supply delivers 770 watts of continuous power for desktop systems that demand stable output. It targets builders who need efficient energy conversion and quiet operation in a standard form factor. The unit carries an 80 PLUS Gold certification, confirming high efficiency across typical load ranges. It is suited for workstations and gaming rigs that prioritise low heat and reduced electricity draw.

Sustained load behaviour with Gold efficiency

Under prolonged load the resonant LLC topology combined with DC-to-DC conversion maintains tight voltage regulation and limits ripple. The design supports modern standby states, allowing the system to enter and exit sleep quickly while drawing minimal power. At low and medium loads the fan remains completely stationary, eliminating audible noise during everyday tasks. Efficiency stays high even during extended sessions, keeping internal temperatures lower than less certified alternatives.

Quiet build with modern standby support

The zero RPM fan mode engages automatically, so the power supply runs silently until thermal demand requires active cooling. Resonant LLC architecture reduces coil whine, contributing to a quieter chassis overall. Modern Standby compatibility means wake-from-sleep times are extremely short, improving daily responsiveness. Builders who need a second high-wattage unit for dual-PSU configurations or who require modular cabling not described here should look elsewhere.

Highlights

  • Modern Standby gives extremely fast wake-from-sleep times
  • 80 PLUS Gold certification lowers power draw and heat
  • Zero RPM fan mode stops the fan at low loads for near-silent use
  • Resonant LLC with DC-to-DC conversion delivers clean power and reduces coil whine
  • ATX form factor fits standard desktop cases

Specifications

TypeATX

Questions about this item

How much noise and heat does the 770 W KHACHIMO supply produce when running all day?

It carries 80 PLUS Gold certification for high efficiency, and its Zero RPM fan mode stops the cooling fan at low and medium loads, giving near-silent operation and cooler temperatures during extended use.

What must I already own for this ATX power supply to work in my build?

You need a standard ATX chassis and a motherboard with a 24-pin main connector plus a 4/8-pin CPU power connector; the unit provides the matching ATX cables.

Will the resonant LLC topology with DC-to-DC conversion cause issues with older components I keep?

The topology delivers clean, consistent power and reduces coil whine, so it works reliably with legacy parts while also supporting modern sleep states.

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