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Rectangular silver ATX power supply with cooling fan and cable bundle

KHACHIMO

KHACHIMO T420 R520 550W ATX power supply

SKU CH-RP5M-0T3TP

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

  • TypeATX
  • Modern Standby compatibility for near-instant wake from sleep
  • 80 PLUS Gold certification delivers up to 96% efficiency under typical loads
  • Zero RPM fan mode stops the fan completely at low and medium loads
  • Resonant LLC topology with DC-to-DC conversion provides clean, stable power output
  • 550 W ATX capacity powers mainstream gaming and workstation builds

550W ATX Power Supply for Modern Standby Systems

The KHACHIMO T420 R520 delivers 550W of continuous power through an ATX form factor. It is built for desktops that use Modern Standby to achieve extremely fast wake-from-sleep times and better low-load efficiency. The unit carries 80 PLUS Gold certification for high efficiency operation that reduces power consumption, noise, and operating temperatures.

Sustained Load Behaviour with Zero RPM Mode

Under sustained load the resonant LLC topology with DC-to-DC conversion provides clean, consistent power while reducing coil whine for quieter operation. At low and medium loads the Zero RPM fan mode switches the cooling fan off entirely for near-silent operation. This topology also enables the use of more energy efficient sleep states during periods of reduced demand.

ATX Interface and Efficiency Limits

The ATX interface defines the mechanical and electrical connection to standard motherboards and cases. 80 PLUS Gold certification sets the practical efficiency floor at typical loads, limiting wasted energy and heat output. Modern Standby compatibility extends the low-load efficiency envelope beyond traditional idle states, supporting faster wake times without sacrificing the efficiency targets certified at 80, 96, 420, 520, and 550 watt reference points.

Points forts

  • Modern Standby compatibility for near-instant wake from sleep
  • 80 PLUS Gold certification delivers up to 96% efficiency under typical loads
  • Zero RPM fan mode stops the fan completely at low and medium loads
  • Resonant LLC topology with DC-to-DC conversion provides clean, stable power output
  • 550 W ATX capacity powers mainstream gaming and workstation builds

Caractéristiques

TypeATX

Questions sur cet article

Does the 550W unit stay quiet and cool when it runs all day?

The 80 PLUS Gold certification and Zero RPM fan mode keep noise and heat low; the fan stops completely at low and medium loads.

What must my case and motherboard already provide for this ATX supply to fit and power on?

A standard ATX mounting space and a 24-pin ATX motherboard connector plus the usual CPU and PCIe cables.

Will the resonant LLC topology with DC-to-DC conversion work reliably with older components I keep?

Yes, the topology delivers clean, consistent power that supports legacy parts and enables efficient sleep states.

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