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Rectangular black ATX power supply unit with cooling fan and cable bundle

KHACHIMO

KHACHIMO 12V 24.2A 300W ATX Power Supply for DPS-250AB-81E

SKU CH-ARSP-EMWXF

Delivers 300W ATX power with 80 PLUS Gold efficiency and zero-RPM fan mode for silent low-load operation

  • TypeATX
  • Fast wake from sleep with Modern Standby support
  • 80 PLUS Gold efficiency cuts power draw and heat
  • Fan stops at low loads for silent running
  • Resonant LLC plus DC-to-DC gives clean, stable power
  • 12 V rail delivers 24.2 A for 300 W output

Replacement ATX Power Supply

This 300 W ATX unit replaces the DPS-250AB-81E, DPS-250AB-81 A and DPS-250AB-81 B models. It delivers 12 V at 24.2 A for systems that require the original form factor and connector layout. Builders restoring or upgrading compatible workstations can install it directly.

Sustained Load Behaviour

Resonant LLC topology with DC-to-DC conversion keeps voltage regulation tight during continuous operation. The design supports modern sleep states and maintains stable output without the ripple that can appear under long-duration loads. Efficiency remains high across the operating range.

Thermals Noise and Power Draw

80 PLUS Gold certification means less waste heat and lower mains draw in normal use. Zero RPM fan mode stops the fan completely at low and medium loads for near-silent running. Cooler internal temperatures also reduce coil whine for a quieter overall system.

Highlights

  • Fast wake from sleep with Modern Standby support
  • 80 PLUS Gold efficiency cuts power draw and heat
  • Fan stops at low loads for silent running
  • Resonant LLC plus DC-to-DC gives clean, stable power
  • 12 V rail delivers 24.2 A for 300 W output

Specifications

TypeATX

Questions about this item

Does the 80 PLUS Gold certified 300 W unit stay quiet and cool when it runs all day?

The 80 PLUS Gold rating means high efficiency, which lowers power draw, heat and noise. Zero RPM fan mode stops the fan completely at low and medium loads for near-silent operation.

What cables or connectors must my build already have for this ATX supply to work?

It uses a standard ATX form factor, so your case must accept an ATX unit and your motherboard needs a 24-pin ATX connector plus the usual CPU and peripheral power leads.

Will this replacement fit the same space and wiring as my old DPS-250AB-81E supply?

It is built to match the DPS-250AB-81E, 81 A and 81 B models, so the mounting holes, connector layout and 12 V 24.2 A output should line up with your existing hardware.

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