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Red AT power supply unit, rectangular metal casing, rear fan grille, side voltage switch, bundled power cord

myVolts

myVolts Atx400W 400W AT power supply

SKU CH-8QHP-51DSY MPN Atx400W

A 400 W AT power supply with manual 115/230 V switching, a 12 cm thermally controlled fan and a 1.1 m mains cord

  • Product typeAT
  • Quick, easy installation with clear connectors
  • Low energy use and quiet operation for basic desktops
  • Flexible 115V or 230V manual voltage switching
  • Automatic fan control via internal thermal sensor
  • 1 metre power cord included for daily needs

400 W AT power supply

The myVolts Atx400W is a 400 W AT-type power supply built for low-energy desktop systems. It delivers power through a 20 + 4 pin motherboard connector, a 4 + 4 pin CPU connector, two fan headers and a 6 + 2 pin video card connector. A 1.1 m mains cord is included in the box.

Basic desktop builders and office upgrades

This unit suits builders assembling a quiet, low-consumption office PC or replacing a failed AT supply in an older chassis. It is not for systems that require active PFC, efficiencies above 80 %, or higher wattage for multi-GPU configurations.

Straightforward AT installation

The keyed connectors and clear labelling make installation quick and effective for anyone familiar with AT wiring. The 115/230 V manual switch must be set to match the local mains voltage before power-on; an incorrect setting will prevent operation or damage the unit. The thermal sensor controls the 12 cm fan speed automatically, so no software setup is required.

How it compares

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

Price $78.99
Cheaper than about 76% of the 10,869 comparable items (median $142.99).

New to this? Buying PC parts with Monero — what to check, what it costs to pay, and what is never asked for.

Specifications

Product
Product typeAT

Questions about this item

Does the power supply include a mains lead or must I supply my own?

The box contains a 1.1 metre mains cord, so no separate cable is required.

Will the 20+4-pin ATX and 4+4-pin CPU connectors fit an older AT-style motherboard?

This unit provides ATX-style connectors (20+4-pin main, 4+4-pin CPU); an AT motherboard needs an adapter, which is not included.

How can I verify the fan is responding to temperature after installation?

The built-in thermal sensor varies the 12 cm fan speed automatically; listen for the fan to spin faster as the supply warms up.

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