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

KHACHIMO

KHACHIMO 1200W ATX Power Supply SRX5600-PWR-AC-A

SKU CH-QAK9-W7ZD5

A 1200W ATX power supply with 80 PLUS Gold efficiency, zero-RPM fan mode and Modern Standby support for quiet, low-power sleep states

  • TypeATX
  • Modern Standby support enables extremely fast wake-from-sleep times
  • 80 PLUS Gold certification delivers high efficiency for lower power consumption and cooler operation
  • Zero RPM fan mode stops the fan at low loads for near-silent performance
  • Resonant LLC topology with DC-to-DC conversion provides clean, consistent power and reduces coil whine
  • 1200W ATX power supply rated for high-demand system builds

1200W ATX Power Supply for Modern Standby Systems

This 1200 watt ATX unit is built for desktops that require high output and Modern Standby compatibility. It suits workstations and enthusiast builds that demand fast wake-from-sleep response and strong low-load efficiency. The Gold-rated design targets users who want reliable power delivery without excess waste heat.

Thermals and Noise with Zero RPM Fan Mode

80 PLUS Gold certification means high efficiency in normal use, resulting in lower power draw, reduced heat and quieter operation. Zero RPM mode stops the fan completely at low and medium loads for near-silent running. Resonant LLC topology with DC-to-DC conversion further cuts coil whine and supports efficient sleep states.

Build Quality and Connector Implications

Clean power from the resonant LLC and DC-to-DC design helps protect sensitive components during daily workloads. Modern Standby support enables quicker resume times for productivity-focused sessions. The ATX form factor fits standard chassis layouts, while the high wattage headroom accommodates demanding GPU and CPU combinations.

Highlights

  • Modern Standby support enables extremely fast wake-from-sleep times
  • 80 PLUS Gold certification delivers high efficiency for lower power consumption and cooler operation
  • Zero RPM fan mode stops the fan at low loads for near-silent performance
  • Resonant LLC topology with DC-to-DC conversion provides clean, consistent power and reduces coil whine
  • 1200W ATX power supply rated for high-demand system builds

Specifications

TypeATX

Questions about this item

How do I install this 1200W ATX power supply and which step is commonly missed?

Mount the unit in a standard ATX case using four screws, connect the 24-pin motherboard and 8-pin CPU cables, then enable Modern Standby in the BIOS to allow fast wake-from-sleep and proper low-load efficiency.

What maintenance or replacement will this power supply need over time?

The Zero RPM fan mode keeps the fan off at low and medium loads, reducing wear; if the fan eventually becomes noisy or stops spinning under load, replace the fan assembly rather than the entire unit.

What limit appears first during sustained heavy loads on this 1200W unit?

The 80 PLUS Gold rating guarantees high efficiency up to full load, so the first practical limit is the 1200W maximum output — exceeding it triggers over-power protection and shuts the unit down.

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