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Rectangular black ATX power supply with cooling fan visible

KHACHIMO

KHACHIMO RH2285 V2 V3 800W power supply

SKU CH-RWYH-0C92E

An 800 W ATX power supply with 80 PLUS Gold efficiency, zero-RPM fan mode and Modern Standby compatibility for fast wake times

  • TypeATX
  • 80 PLUS Gold certification cuts electricity use and heat
  • Zero RPM fan mode stops the fan at low load for silent running
  • Modern Standby compatibility gives faster wake-from-sleep and better idle efficiency
  • Resonant LLC topology with DC-to-DC conversion delivers clean power and reduces coil whine
  • 800 W ATX output powers demanding components reliably

800W ATX power supply for modern PCs

The KHACHIMO RH2285 V2 V3 delivers 800W of continuous power through a standard ATX form factor. It is built for system builders who need reliable output for mid-range to high-end components. The unit supports Modern Standby for rapid wake-from-sleep behaviour in compatible operating systems.

80 PLUS Gold efficiency and headroom

Certified at 80 PLUS Gold, the supply maintains high efficiency across typical loads, reducing waste heat and electricity draw. The 800W rating provides comfortable headroom for single-GPU configurations with modern CPUs, while the 12V rail delivers stable current for demanding hardware. Continuous loads near the maximum will increase fan activity and thermals.

Resonant LLC topology replaces older

The resonant LLC design with DC-to-DC conversion supersedes legacy group-regulated topologies, offering tighter voltage regulation and reduced coil whine. Zero RPM fan mode eliminates noise at low and medium loads, a distinct upgrade over always-spinning designs. The jump is worth it when building or refreshing a system where quiet operation and Modern Standby support are priorities.

Highlights

  • 80 PLUS Gold certification cuts electricity use and heat
  • Zero RPM fan mode stops the fan at low load for silent running
  • Modern Standby compatibility gives faster wake-from-sleep and better idle efficiency
  • Resonant LLC topology with DC-to-DC conversion delivers clean power and reduces coil whine
  • 800 W ATX output powers demanding components reliably

Specifications

TypeATX

Questions about this item

Will this 800W unit work with an older motherboard that only has a 20-pin ATX and a 4-pin CPU connector?

The PSU uses a 24-pin ATX connector that splits to 20+4 pins and a 4+4-pin CPU cable that can be used as a 4-pin, so it fits legacy boards.

How can I confirm the Zero RPM Fan Mode is actually active after I install the PSU?

Under light loads the fan stays off completely; you will hear no spinning noise and can verify zero RPM in BIOS or monitoring software.

Does the box include every cable needed for a standard build or must I buy extensions separately?

Fixed cables cover the 24-pin ATX, 4+4-pin CPU, two 6+2-pin PCIe and peripheral leads for a typical system.

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