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Black ATX power supply unit with cooling fan and cable connectors

KHACHIMO

KHACHIMO 1600W ATX power supply RH1448Y 0957-2198 0957-2320

SKU CH-JF21-4J1JP

ATX power supply delivering 1600 W with 80 PLUS Gold efficiency, Modern Standby support, Zero RPM fan mode and resonant LLC topology with DC-to-DC conversion

  • Product typeATX
  • Modern Standby compatible for extremely fast wake-from-sleep times
  • 80 PLUS Gold certified for high efficiency and lower power consumption
  • 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, consistent power and reduces coil whine
  • 1600W ATX power supply supports RX3600, RX4640 and RX6600 systems

1600W ATX Power Supply

The KHACHIMO unit delivers 1600W through an ATX form factor and carries 80 PLUS Gold certification for high efficiency. Modern Standby compatibility enables extremely fast wake-from-sleep transitions and improved low-load efficiency. A resonant LLC topology with DC-to-DC conversion provides clean, consistent power while reducing coil whine.

Quiet-build enthusiasts and high-output systems

Builders who prioritise near-silent operation at low and medium loads will benefit from the Zero RPM fan mode that stops the fan entirely. Systems requiring Modern Standby support for rapid sleep-wake cycles are well matched. Buyers who need a lower maximum wattage or a different form factor should consider other options.

Standard ATX installation

The power supply fits standard ATX mounting points and uses conventional cable connections for straightforward integration. Zero RPM fan mode engages automatically, so no software configuration is required for silent low-load operation. Ensure the case provides adequate airflow for the fan when it becomes active under heavier loads.

How it compares

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

Price $411.99
Pricier than about 85% of the 10,869 comparable items (median $142.99).

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Specifications

Product
Product typeATX

Questions about this item

What ATX motherboard and case clearance do I need to install this 1600W unit?

A standard ATX motherboard with a 24-pin connector plus an ATX case that accepts a full-size power supply will fit the RH1448Y.

Can I keep my older RX3600 or RX4640 workstation and just swap the power supply?

Yes — the RH1448Y is listed for RX3600, RX4640 and RX6600 systems, so it replaces the original supply without adapter cables.

How do I verify the Zero RPM fan mode is active after building?

Under light load the fan should stay completely still; listen for silence and watch the blades — they only spin once the load rises above the Zero RPM threshold.

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