Best 1000W PSU 2023 – our top high wattage power supplies

With more power hungry components, you'll need a PSU to match

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With component power ratings on the rise, you need a power supply to match, as such the best 1000W PSU is the one to look for, an ideal solution for gaming PCs with flagship components. As a power supply is the life force of your system, it needs to be reliable, high quality and the best PSU for the job.

When choosing the right model, everything from your budget to efficiency requirements needs to be considered. A high-end gaming PC featuring an RTX 4090 would benefit from a high-wattage PSU even though it is technically more than required. This is because many system builders seek a bit of headroom and longevity from their investment. Every selection in this round up features a high trust rating, excellent build quality, and impressive warranty.

For an all-around best 1000W PSU, the Corsair RM1000X is the option to go for. It is rated with a Gold 80 Plus rating which is a standard rating for power conversion in most power supplies. But that does balance out the cost of a higher wattage unit might need.

It is a fully modular design so you can choose which cables you need to actually put into your build. Since you might not need to have all of those extra SATA cables for your one singular SSD. Or then you might need to use up three PCIe of the six.

In total, you will find two EPS, 11 SATA, two floppy, eight PCIe, and one motherboard connector in the supply of the PSU. That gives you plenty of opportunity to fit in anything you might need in your gaming PC.

If you’re more concerned about the power ratings, then you should consider the most efficient power supply. That comes with the Seasonic Prime ATX 3.0 TX-1300, with a Titanium 80 Plus and Cybenetics rating, it does reach the top spec of efficiency above 90% across the board.

The fully modular power supply comes with plenty of connectors to take advantage of. It has one motherboard, three CPU, six PCIe, 16 SATA, one SATA 3.3V, three Molex, and two 12VHPWR connectors for you to power all of your components. It also comes with a Lamda A certification from Cybenetics giving you peace of mind that it is a quiet PSU as well that will keep things running. It also comes with a long 12-year warranty it comes with so it should last you some time.

Building in a micro ATX or mini ATX case, you might have to go for an SFX power supply to fit in there. For that, you want the best power supply in the SFX form factor, and the ASUS ROG Loki SFX-L is the one to go for.

It also comes with a platinum rating so it’s a highly efficient build but does come with the extra cost as well as the premium smaller components ask for. As a ROG component, it comes with Aura sync RGB lights on its Axial tech 120mm fan to fully fit in with the rest of your build.

Also qualified for the ATX 3.0 specification, the PSU comes with one motherboard, two CPU, three PCIe, one 12VHPWR, six SATA, and four peripheral connectors available. Along with a 10-year warranty for convenience and peace of mind.

Is a 1000W PSU for you?

1000W is a very high wattage to go for, but it gives plenty of headroom for quieter operation or longevity. If you have a powerful GPU or CPU it might already be a requirement, however, if not gives you something to upgrade into in years to come.

As these PSUs are meant to last a long time, they are a good future-proof option, as who knows how powerful the next generation of graphics cards will get.

Connectors

Planning to or using one of Nvidia’s new GPUs, you might have to use the 16-pin connector it has on it. You could use an adapter that comes with it, but some power supplies support it natively and prevent the need for an Octopus connector.

You may also have a varying number of SATA devices and peripherals that need power in your system. With a 1000W PSU, you can expect most of the options to feature all of the necessary cables and plenty of options for connecting them up.

Modularity

When cable management is a consideration for your build, going for a fully modular power supply is the best option for it. Although the PSUs at this wattage are top-tier and so are unlikely to be anything but modular. This means you can limit the number of connectors you actually use and reduce the cable clutter in the back of your case, altogether making cable management easier and much nicer to look at.

Power efficiency

At a 1000W there is a lot of power that needs converting from your AC wall supply to the DC power your PC needs. That conversion is inefficient and produces heat which is wasteful, so these ratings give you an idea of how effective it is. If it’s 80 Plus or the more recent Cybenetics certification they range from bronze to platinum at how effective the conversion is and how much money you can save on electricity costs.