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Compact ATX power supply unit with metal casing and cable bundle

KHACHIMO

KHACHIMO MK40S-12 ASM-0100 EFM-1505 12V 40W ATX power supply

SKU CH-Z4D5-8634T

Compact 40W ATX power supply delivering 12V for small form factor builds

  • Product typeATX
  • Delivers 40 W of stable 12 V power for compact builds
  • ATX form factor fits standard chassis without adapters
  • Tested and verified working before dispatch for immediate reliability
  • Quality components ensure consistent output under load
  • First listed by the manufacturer on 26 March 2024

KHACHIMO 40 W ATX Power Supply

This 12 V, 40 W ATX unit delivers basic power for low-draw desktop builds or replacement scenarios. It is suited to compact systems, thin clients or legacy boards where a full-sized PSU would be excessive.

40 W capacity and headroom

The 40 W ceiling handles a single 12 V rail feeding a modest CPU, integrated graphics and a few peripherals. It runs out quickly when discrete graphics cards, multiple drives or high-wattage processors are added.

ATX interface practical limits

The standard ATX form factor fits common chassis and motherboard headers, yet the 40 W rating restricts use to entry-level configurations. Builders needing more 12 V current or additional PCIe connectors must select a higher-output unit.

How it compares

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

Price $544.99
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

Will the MK40S-12 fit and power an older ATX motherboard I want to keep?

Yes, the MK40S-12 uses the standard ATX form factor and provides 12 V at 40 W, matching the connector layout and voltage rail of legacy ATX boards.

How can I confirm the MK40S-12 is working correctly after I install it?

The unit is test-working from the manufacturer; after installation, verify that the system powers on stably and the 12 V rail delivers power to the motherboard and drives.

What comes in the box with the MK40S-12 and what must I source separately?

The power supply unit itself is included; mounting screws, power cord and any adapter cables for older peripherals are not supplied and must be obtained separately.

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