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

KHACHIMO

KHACHIMO PWS-1K21P-1R 1200W ATX power supply

SKU CH-RDFT-R45NA

Delivers 1200W of 80 PLUS Gold certified power with Modern Standby support, zero-RPM fan mode and resonant LLC topology for clean, quiet operation

  • TypeATX
  • Faster wake-from-sleep with Modern Standby support
  • Lower electricity use and heat through 80 PLUS Gold efficiency
  • Silent operation at typical loads via Zero RPM fan mode
  • Clean, stable power delivery from resonant LLC and DC-to-DC design
  • 1200 W capacity for demanding multi-GPU systems

1200W ATX Gold PSU

The KHACHIMO PWS-1K21P-1R is a 1200W ATX power supply built for high-performance desktop builds that demand reliable, efficient power delivery. Its 80 PLUS Gold certification ensures high efficiency across typical loads, reducing wasted energy and operating costs for enthusiasts and workstation users.

Thermals noise and power draw

A Zero RPM fan mode keeps the unit completely silent at low and medium loads by stopping the fan entirely. The resonant LLC topology with DC-to-DC conversion provides clean, consistent power while reducing coil whine. Modern Standby compatibility enables faster wake-from-sleep times and better low-load efficiency for cooler, quieter operation.

Upgrade path and value

This unit replaces older or lower-wattage power supplies that cannot support Modern Standby sleep states or deliver 1200W with Gold-rated efficiency. The jump is worthwhile for builders moving to high-end multi-GPU configurations or workstations needing stable, low-noise power with advanced sleep-state support.

Pluspunten

  • Faster wake-from-sleep with Modern Standby support
  • Lower electricity use and heat through 80 PLUS Gold efficiency
  • Silent operation at typical loads via Zero RPM fan mode
  • Clean, stable power delivery from resonant LLC and DC-to-DC design
  • 1200 W capacity for demanding multi-GPU systems

Specificaties

TypeATX

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How do I install this 1200W ATX power supply and what is the common mistake?

Mount the unit in a standard ATX case, connect the 24-pin motherboard, 8-pin CPU and GPU cables, then route cables for airflow; the step often missed is enabling Modern Standby in the BIOS so the fast wake and low-load efficiency actually work.

What maintenance or replacement will this PSU need later?

The Zero RPM fan mode keeps the fan off at low and medium loads, reducing wear, so the only routine task is occasional dust removal from the intake grill; no user-replaceable parts are specified.

What limit appears first during sustained high load on this 1200W unit?

The 80 PLUS Gold rating guarantees high efficiency up to full output, so the first limit under continuous draw is the 1200W maximum power ceiling; exceeding it triggers over-power protection.

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