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Rectangular ATX power supply unit with matte black finish and cooling fan visible

KHACHIMO

KHACHIMO RD330 340 530 630 540 640 800W Power Supply

SKU CH-PZ9P-RFP4Y

An 800 W ATX unit covering RD330, 340, 530, 630, 540 and 640 models with 80 PLUS Gold efficiency, Zero RPM fan mode and Modern Standby support

  • Product typeATX
  • Fast wake-from-sleep with Modern Standby support
  • 80 PLUS Gold efficiency cuts power draw and heat
  • Zero RPM fan mode stops fan at low load
  • Resonant LLC topology with DC-to-DC reduces coil whine
  • Clean, consistent power delivery for efficient sleep states

800W ATX Power Supply

The KHACHIMO RD series delivers 800 watts of continuous power through a standard ATX form factor. It targets desktop builders who need reliable energy delivery for modern components and value high efficiency at typical loads.

Upgrading from lower-wattage or Bronze units

Replacing a supply rated below 800W or one without Gold certification brings measurable gains in efficiency and thermal headroom. The jump is worth it when the system draws sustained power near the previous unit’s limit or when Modern Standby sleep states are required.

Sustained-load behaviour

Resonant LLC topology with DC-to-DC conversion maintains clean voltage regulation during extended workloads. Zero RPM fan mode keeps the unit silent at low and medium loads, while 80 PLUS Gold efficiency reduces waste heat under continuous demand.

How it compares

Measured against everything we stock in ATX Desktop Power Supplies, at today’s prices. Recalculated every night.

Price $124.99
Cheaper than about 57% of the 10,869 comparable items (median $142.99).

New to this? Buying PC parts with Monero — what to check, what it costs to pay, and what is never asked for.

Specifications

Product
Product typeATX

Questions about this item

What ATX case clearance is required to fit the 800W unit?

The power supply follows the standard ATX form factor, so any case that accepts an ATX PSU will accommodate it.

Which cables must be connected during installation to enable Modern Standby fast wake?

Connect the 24-pin ATX motherboard cable, the CPU 4+4-pin or 8-pin cable, and ensure the PSU power switch is set to on before enabling Modern Standby in the BIOS.

How can the Zero RPM fan mode be verified after a few years of use?

Under light load, listen for fan spin; if the fan stays off while the system is idle, Zero RPM mode is still functioning.

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