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Silver rectangular ATX power supply unit with fan grille

KHACHIMO

KHACHIMO 300W ATX Power Supply MSP300-5.0 MCP300WM-4.5

SKU CH-R52G-Q68PM

An ATX power supply delivering 300 W with 80 PLUS Gold efficiency, zero-RPM fan mode, and Modern Standby support for fast wake times

  • Product typeATX
  • Fast wake from sleep with Modern Standby support
  • 80 PLUS Gold efficiency cuts power draw and heat
  • Fan stops completely at low loads for silence
  • Resonant LLC topology delivers clean, stable power
  • DC-to-DC conversion enables deeper, efficient sleep states

300 W ATX power supply for modern standby systems

The KHACHIMO MSP300-5.0 MCP300WM-4.5 delivers 300 W of continuous power in a standard ATX form factor. It targets builders assembling compact or office-oriented PCs that rely on fast wake-from-sleep behaviour. The unit carries 80 PLUS Gold certification for high efficiency across typical loads.

Resonant LLC topology with DC-to-DC conversion

This design provides clean, consistent power while reducing coil whine for quieter operation. A zero RPM fan mode stops the cooling fan entirely at low and medium loads, enabling near-silent running during everyday tasks. Modern Standby compatibility ensures extremely fast wake times and better low-load efficiency.

Practical limits of the ATX interface

The 300 W rating restricts the unit to systems with modest combined CPU and GPU power draw. Builders planning high-end graphics cards or multi-drive arrays will need a higher-capacity supply. The fixed cable set and single EPS connector may limit flexibility in some chassis layouts.

How it compares

Measured against everything we stock in ATX Desktop Power Supplies, at today’s prices. Recalculated every night.

Price $167.99
Pricier than about 56% of the 10,869 comparable items (median $142.99).

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Specifications

Product
Product typeATX

Questions about this item

What ATX standard does the 300W PSU meet, and what efficiency does it guarantee?

It is an ATX type unit with 80 PLUS Gold certification, meaning at least 80 % efficiency at typical loads for lower power draw and cooler running.

What physical space is required to fit this power supply?

It uses the standard ATX form factor, so it mounts in any case with an ATX PSU cut-out; verify your chassis depth allowance before buying.

How do I install it, and what step do builders often miss?

Secure the unit with four screws, connect the 24-pin motherboard and CPU power cables, then ensure the AC voltage selector (if present) matches your mains supply before first power-on.

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