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Power Supplies (PSU / SMPS)

Power supplies by wattage, efficiency rating and cabling. Leave headroom above your build’s estimated draw.

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Popular power supplies

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560 power supplies

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Buying power supplies: common questions

How many watts do I need?

Add up the processor and graphics card power, add about 100 W for the rest, then leave 30 to 40% spare. Most gaming PCs with one mid-range card are fine on 650 to 750 W. The PSU calculator does the maths for you.

What do 80 Plus Bronze, Gold and Platinum mean?

How much power is wasted as heat. Gold wastes less than Bronze and usually comes with better parts and a longer warranty. Bronze is fine for budget builds.

Do I need an ATX 3.0 / 3.1 power supply?

It's nice to have for new NVIDIA cards because it has the 12V-2x6 cable built in. Older units work with the adapter that comes in the graphics card box.

Is it OK to buy a cheap SMPS?

Don't cut corners here. A bad power supply can take other parts with it when it fails. Stick to known brands and models with at least a 5-year warranty.