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Rectangular ATX power supply unit with matte black metal casing and visible cooling fan grille

KHACHIMO

KHACHIMO SD-P300ATX 450W ATX power supply

SKU CH-2NRX-MNGG5

ATX power supply delivering 450 W with 80 PLUS Gold efficiency, Modern Standby support, and a zero-RPM fan mode for silent low-load operation

  • TypeATX
  • Modern Standby support enables extremely fast wake-from-sleep times
  • 80 PLUS Gold certification delivers high efficiency for lower power consumption and cooler running
  • Zero RPM fan mode stops the fan at low and medium loads for near-silent operation
  • Resonant LLC topology with DC-to-DC conversion provides clean, consistent power and reduces coil whine
  • 450 W ATX output supplies reliable power for standard desktop builds

450W ATX power supply for modern standby systems

The KHACHIMO SD-P300ATX delivers 450 watts of continuous power in a standard ATX form factor. It is built for desktop PCs that use modern standby sleep states and require high efficiency at low loads. The 80 PLUS Gold certification confirms reduced waste heat and lower electricity draw across typical workloads.

Practical limits of the ATX interface

The unit follows the ATX specification, so it fits standard chassis and connects to mainstream motherboards without adapters. Its 450W rating sets the maximum combined output for all rails, meaning systems with multiple high-end graphics cards or extreme overclocks will exceed this supply. The resonant LLC topology with DC-to-DC conversion maintains tight voltage regulation within the standard’s defined tolerances.

Replaces older low-efficiency or noisy units

This supply upgrades from power supplies that lack 80 PLUS Gold efficiency or modern standby support, eliminating coil whine and enabling deeper sleep states. The zero RPM fan mode removes acoustic noise at low and medium loads where older units still spin. The jump is worth it when building or refreshing a system that idles often and values silent operation.

Helstu kostir

  • Modern Standby support enables extremely fast wake-from-sleep times
  • 80 PLUS Gold certification delivers high efficiency for lower power consumption and cooler running
  • Zero RPM fan mode stops the fan at low and medium loads for near-silent operation
  • Resonant LLC topology with DC-to-DC conversion provides clean, consistent power and reduces coil whine
  • 450 W ATX output supplies reliable power for standard desktop builds

Tæknilýsing

TypeATX

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Should I choose the 300 W or 450 W version of this ATX power supply?

The SD-P300ATX is a 450 W unit; the 300 W figure refers to the model name only, so select this model when your build requires up to 450 W of continuous power.

What does the 80 PLUS Gold rating mean for my daily electricity bill and system temperatures?

It certifies high efficiency across typical loads, so the PSU draws less power from the wall, runs cooler and keeps fan noise lower during everyday use.

How does the ATX form factor and Modern Standby support affect compatibility with my motherboard?

The standard ATX size fits regular desktop cases, while Modern Standby compatibility enables faster wake times and deeper low-power sleep states on supported boards.

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