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Silver rectangular ATX power supply unit with fan grille

KHACHIMO

KHACHIMO 300W Peak 400W ATX Power Supply SD-3450U/2U

SKU CH-0J1Y-HKK7W

An ATX power supply delivering 300 W continuous and 400 W peak with 80 PLUS Gold efficiency, Modern Standby support, zero-RPM fan mode and resonant LLC plus DC-to-DC topology for clean, quiet power

  • TypeATX
  • Fast wake-from-sleep with Modern Standby support
  • 80 PLUS Gold efficiency lowers power draw and heat
  • Fan stops at low load for silent running
  • Resonant LLC and DC-to-DC design delivers clean power
  • 300 W continuous output with 400 W peak capacity

What the 300W ATX supply powers

This 300W continuous ATX unit delivers 400W peak output for compact workstations and small-form-factor builds that need efficient, reliable power. It suits office PCs, home servers and media centres where steady output matters more than extreme headroom.

Build cues from Modern Standby and zero-RPM mode

Modern Standby compatibility means the supply supports ultra-fast wake-from-sleep and deeper low-power states used by current operating systems. The Zero RPM fan mode stops the fan completely at low and medium loads, so the system stays near-silent during everyday tasks.

Thermals and efficiency in daily use

80 PLUS Gold certification confirms high efficiency across typical loads, reducing waste heat and keeping internal temperatures lower. Resonant LLC topology with DC-to-DC conversion supplies clean, stable rails while minimising coil whine, so power delivery stays quiet and consistent.

Highlights

  • Fast wake-from-sleep with Modern Standby support
  • 80 PLUS Gold efficiency lowers power draw and heat
  • Fan stops at low load for silent running
  • Resonant LLC and DC-to-DC design delivers clean power
  • 300 W continuous output with 400 W peak capacity

Specifications

TypeATX

Questions about this item

What does the 80 PLUS Gold rating mean for real-world efficiency?

The 80 PLUS Gold certification confirms high efficiency at typical loads, reducing power draw, heat output and fan noise compared with lower-rated units.

What physical space does this 2U form factor require inside a case?

The 2U height fits rackmount or slim tower chassis designed for two rack units; verify your case supports that clearance before ordering.

How is the Zero RPM fan mode activated during installation?

Zero RPM engages automatically at low and medium loads; no BIOS or software setting is needed, just ensure the fan header is connected so the controller can manage speed.

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