
ATX Power Adaptor Board
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Prices updated: 12 Oct 2026
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About this product
An ATX power adaptor board that lets you take power from the outputs of a standard ATX PC power supply for electronics projects and bench use. It exposes the supply's DC rails at accessible connection points, so an ATX PSU can power external circuits without a dedicated case or power supply.
Specifications
- Board type
- ATX PSU adaptor board
- Power source
- Standard ATX PC power supply
Frequently asked questions
How do I switch an ATX power supply on without a motherboard?
With the PSU unplugged from mains, connect the green PS_ON wire to any black ground wire using a jumper. Then plug the PSU into mains and power it on. Disconnect the jumper and mains before making any changes.
Which voltages are available from the adaptor board?
Standard ATX supplies provide +3.3 V, +5 V and +12 V rails, along with -12 V and a 5 VSB standby rail. Check the labels on your board for the exact outputs it exposes, and keep a minimum load on the supply as recommended by the PSU.



