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Rectangular grey metal ATX power supply unit with single fan and power connector visible

Replace Power

Replace Power RP-MPS3-420 420W ATX power supply

SKU CH-91EB-DG2MW MPN RP-MPS3-420

ATX power supply delivering 420W with a single fan and weighing 2.2 units

  • TypeATX
  • Fans1
  • Weight2.2
  • 420 W output delivers stable power for standard desktop builds
  • Single cooling fan maintains airflow inside the chassis
  • ATX form factor fits most mid-tower and full-tower cases
  • Unit weighs 2.2 kg for secure mounting
  • New condition ensures full rated performance from first use

What this power supply is and who it suits

The Replace Power RP-MPS3-420 is a 420W ATX unit designed for standard desktop builds. It fits users who need a straightforward replacement or a basic power source for office and home systems. The single fan provides active cooling within a compact frame.

What the included accessories change

The unit ships as a standalone power supply with standard ATX connectors. No modular cables, adapters or software utilities are bundled, so cable routing depends entirely on the fixed harness. Installation follows the usual ATX mounting pattern without extra hardware.

What to verify on your current build

Confirm that your case accepts a standard ATX power supply and that the 420W rating covers the total draw of your components. Check that the fixed cable set includes the connectors your motherboard, graphics card and drives require. The unit weighs 2.2 units.

Highlights

  • 420 W output delivers stable power for standard desktop builds
  • Single cooling fan maintains airflow inside the chassis
  • ATX form factor fits most mid-tower and full-tower cases
  • Unit weighs 2.2 kg for secure mounting
  • New condition ensures full rated performance from first use

Specifications

BrandReplace Power
ModelRP-MPS3-420
TypeATX
Fans1
Weight2.2

Questions about this item

Will the single fan need replacement after extended use?

The unit uses one fan for cooling; fan lifespan depends on operating temperature and dust levels, so periodic cleaning can extend its service life.

What limit appears first when the 420W supply runs continuously at high load?

The 420W rated output is the primary limit; sustained loads near that level will trigger over-current or over-temperature protection before any other constraint.

How much noise and heat does the 2.2 kg unit produce during all-day operation?

With a single fan and 420W capacity, audible noise and exhaust heat rise with load; typical office workloads stay quiet while full-load runs increase both noticeably.

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