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Rectangular black ATX power supply unit with cooling fan grille and modular cable sockets

KHACHIMO

KHACHIMO RG-S6120 S6510 550W power supply

SKU CH-0546-7HJ0F

An 80 PLUS Gold 550 W ATX unit with Modern Standby support, zero-RPM fan mode and resonant LLC plus DC-to-DC topology for clean, quiet power

  • TypeATX
  • Modern Standby support enables extremely fast wake-from-sleep times
  • 80 PLUS Gold certification delivers high efficiency for lower power consumption
  • Zero RPM fan mode stops the fan at low loads for near-silent operation
  • Resonant LLC topology with DC-to-DC conversion provides clean, consistent power
  • 550W ATX design supplies reliable power for modern system builds

550W ATX power supply

The KHACHIMO RG-S6120 S6510 is a 550W ATX power supply built with resonant LLC topology and DC-to-DC conversion for clean, consistent power delivery. It carries 80 PLUS Gold certification for high efficiency, lower power draw, and cooler running temperatures. Modern Standby compatibility enables extremely fast wake-from-sleep times and improved low-load efficiency. This unit suits builders assembling mid-range systems who value quiet operation and energy savings.

Zero RPM fan mode for quiet builds

The Zero RPM fan mode stops the cooling fan completely at low and medium loads, delivering near-silent operation for office or media PCs. Resonant LLC topology with DC-to-DC conversion reduces coil whine and supports more efficient sleep states. Buyers who need higher wattage for multi-GPU configurations or extreme overclocking should look at higher-capacity units instead.

Fits standard ATX cases

This ATX-form-factor supply slots into standard chassis layouts and provides the cabling required for typical motherboard, graphics card, and storage connections. High efficiency and low heat output ease thermal management inside the case, while Modern Standby support frees the system to enter and exit low-power states quickly. Ensure your build's total power draw stays within the 550W rating for stable operation.

Highlights

  • Modern Standby support enables extremely fast wake-from-sleep times
  • 80 PLUS Gold certification delivers high efficiency for lower power consumption
  • Zero RPM fan mode stops the fan at low loads for near-silent operation
  • Resonant LLC topology with DC-to-DC conversion provides clean, consistent power
  • 550W ATX design supplies reliable power for modern system builds

Specifications

TypeATX

Questions about this item

Does the ATX form factor of the RG-S6120 S6510 fit my existing case and motherboard?

The unit follows the ATX standard, so it will mount in any ATX-compatible case and connect to a 24-pin ATX motherboard without adapters.

Will the 550W output and Modern Standby support work with my older CPU and GPU that lack deep sleep states?

The power supply delivers up to 550W and remains fully backward compatible; Modern Standby features simply stay inactive on hardware that does not implement them.

How can I confirm the Zero RPM fan mode is actually engaging at low load?

When the system is idle or under light load the fan stops completely — listen for silence and check that the 80 PLUS Gold efficiency rating is reported in monitoring software.

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