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Rectangular ATX power supply unit with matte black finish and cooling fan visible

KHACHIMO

KHACHIMO CUS100MB 28V 2.9A 100W power supply

SKU CH-ZB3P-29JC5

Delivers 100 W at 28 V and 2.9 A with 80 PLUS Gold efficiency, Modern Standby support, and a zero-RPM fan mode for silent low-load operation

  • Product typeATX
  • Modern Standby support for instant wake and low-load efficiency
  • 80 PLUS Gold certified efficiency cuts power use and heat
  • Zero RPM fan mode stops the fan at low loads for silent operation
  • Resonant LLC topology with DC-to-DC delivers clean power and reduces coil whine
  • 100 W output at 28 V 2.9 A powers demanding builds reliably

100 W ATX Power Supply

This KHACHIMO unit delivers 100 W of continuous power through a 28 V output rated at 2.9 A. It is built to the ATX form factor and carries 80 PLUS Gold certification for high efficiency. The design targets system builders who need a compact, efficient supply for low-power configurations.

Suitable for modern standby PCs and silent builds

Modern Standby compatibility enables extremely fast wake-from-sleep times and improved low-load efficiency. Zero RPM fan mode stops the fan entirely at low and medium loads for near-silent operation. Builders who require higher wattage for multi-GPU setups or heavy overclocking should look at higher-capacity units instead.

Verify ATX fit and 28 V rail requirements

Confirm that your chassis accepts a standard ATX power supply and that your components are designed for a 28 V primary rail. Check that the 100 W total output covers the combined draw of your CPU, graphics card and peripherals. Ensure the included connectors match your motherboard and device needs before ordering.

How it compares

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

Price $487.99
Pricier than about 90% of the 10,869 comparable items (median $142.99).

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Specifications

Product
Product typeATX

Questions about this item

What motherboard power connector does the CUS100MB-28A need to turn on?

The unit is an ATX power supply, so it provides a 24-pin main connector and a CPU power connector that plug directly into a standard motherboard.

Will my older motherboard work with the Modern Standby features of this 100W unit?

Modern Standby requires platform support; the PSU will still deliver 28 V at 2.9 A on older boards, but the fast wake and low-load efficiency benefits only activate on compatible systems.

How can I confirm the 80 PLUS Gold efficiency is active after I install the supply?

At typical loads the fan stays off in Zero RPM mode, and the system wakes from sleep almost instantly, showing the high-efficiency LLC topology and DC-to-DC conversion are operating.

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