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

KHACHIMO

KHACHIMO 650W ATX Power Supply YM-2651J PSR650B-12D1

SKU CH-FHYM-6CK20

An ATX power supply delivering 650W with 80 PLUS Gold efficiency, zero-RPM fan mode, and LLC resonant topology with DC-to-DC conversion for Modern Standby compatibility

  • Product typeATX
  • Fast wake-from-sleep with Modern Standby support
  • 80 PLUS Gold efficiency cuts power draw and heat
  • Zero RPM mode stops the fan at low loads
  • Resonant LLC topology with DC-to-DC delivers clean power
  • 650W ATX output for reliable system power

650W ATX PSU with Gold Efficiency

This KHACHIMO power supply delivers 650W of continuous power in a standard ATX form factor. It carries 80 PLUS Gold certification, indicating high efficiency across typical loads. The unit supports Modern Standby for rapid wake-from-sleep transitions and improved low-load efficiency. Resonant LLC topology with DC-to-DC conversion ensures clean, consistent power delivery.

Suited for Efficient Mid-Range Builds

Ideal for system builders who prioritise low noise and energy efficiency in a mid-range desktop. The zero RPM fan mode keeps the unit silent during light workloads, benefiting home office or media centre environments. Builders requiring higher wattage for multi-GPU configurations or extreme overclocking should consider higher-capacity alternatives. Those needing modular cabling for compact cases should verify cable management requirements.

Integrates into Standard ATX Systems

Fits standard ATX chassis and provides the necessary connectors for modern motherboards, graphics cards and storage devices. DC-to-DC conversion minimises ripple on minor rails, supporting stable operation of sensitive components. Modern Standby compatibility frees the system to enter deeper sleep states without compatibility issues. High Gold-rated efficiency reduces waste heat, easing the burden on case airflow.

How it compares

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

Price $283.99
Pricier than about 75% of the 10,869 comparable items (median $142.99).

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Specifications

Product
Product typeATX

Questions about this item

Does my case need to fit a standard ATX power supply for this 650W unit to install correctly?

Yes, the unit follows the ATX form factor so it mounts in any case designed for an ATX power supply.

Can I use this PSU with an older motherboard that does not support Modern Standby sleep states?

Yes, the PSU works with any ATX motherboard; Modern Standby compatibility simply means it also supports the newer low-power sleep states if your board offers them.

How can I confirm the fan is behaving correctly after I build the system?

Under light or medium load the fan should stay completely still due to Zero RPM mode, then spin up only when the load rises enough to require active cooling.

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