Up to 650W Power Supplies

What to look for in a 400W–650W power supply

When choosing your base-wattage power supply, explore the following specs:

• Continuous power rating: All the power supplies on this page will be 650 watts or less.
• Size and form factor: All PSUs on this page are ATX, but compare that against the possibility of getting a smaller SFX unit.
• Modularity and connectivity: Consider the ports you need and whether you want a fully modular or semi-modular power supply.
• Efficiency scores: You can filter amongst 80 Plus and Cybenetics ratings.

Can power supplies up to 650 watts handle modern gaming and high-end GPUs?

If you’re looking to take the conservative approach when buying a power supply unit for your PC, then the first question should be “is it going to be enough for your build?” The answer really comes down to what the components are inside your PC build. To determine if a lower-wattage PSU is enough, add up all the power draws of your components for your build. If that number is lower than the continuous power rating of the PSU then it’ll likely run. But also be sure to build in at least 25% headroom to keep your PSU running efficiently.

Not sure which PSU is right for your setup? Try out our PSU Calculator for instant feedback on wattage requirements and compatibility.

Or check out our Custom PC Builder for recommendations, size guides, and compatibility checks for your next PC build.