Best PSU for RTX 5080

Let’s cut to the chase here: The Nvidia GeForce RTX 5080 is a power-hungry GPU. Maybe not quite in the same league as the RTX 5090, but you couldn’t really call it shy about its designs on power. Put succinctly, you'll need a reliable and robust power supply unit (PSU) to get the most from it. The RTX 5080 not only requires plenty of wattage to strut its polygon-pumping stuff but it also needs a specific power connector, namely the 12V-2x6 GPU connector.

• PCIe 5.0 x16 slot (For best performance, though it will perform almost as well in a PCie 4.0 slot)
• 360W Total Graphics Power
• 850W Minimum System Power
• 3x PCIe 8-pin cables (sometimes included) OR 1x 450 W or greater PCIe Gen 5 cable

These requirements represent a significant jump compared to the previous generation's RTX 4080, which demanded just 320W as opposed to the 360W we’re seeing here. In fact, this is more in line with the RTX 4090, perfectly underlining the generational jump when it comes to power requirements.

It’s worth noting that not all RTX 5080s are the same when it comes to power needs. These figures are based on the Founders Edition from Nvidia, but cards from the likes of Asus, Gigabyte, MSI, and Zotac may have different requirements. Make sure to check the requirements of the specific 5080 you have in mind to be sure.

If you're fortunate enough to have a cutting-edge GPU like the 5080, then a correspondingly cutting-edge PSU like the CORSAIR HX1000i SHIFT just makes sense.

The HXi SHIFT series represents a combination of quality of life improvements. Firstly, it has the same side-mounted connections from the RMx SHIFT PSUs, which provide a more accessible fully modular interface. Secondly, they have an integrated iCUE LINK System Hub, meaning that you no longer need an additional fan controller or hub.

Additionally, the HX1000i SHIFT is Platinum-certified by Cybenetics, comes with a native 600W-capable 12V-2x6 cable, and a 10-year warranty.

If you’re the type of gamer that wants to enjoy the latest titles at the best settings but wants to do so quietly, then this is the power supply for your build. The CORSAIR HX1200i is a fully modular 80 PLUS Platinum and Cybenetics Platinum rated PSU that achieves up to 92% efficiency for exceptional power delivery and long-term reliability.

The HXi series supports Zero RPM mode, and due to 1200W being way over spec for the 5080, you'll spend most of your time in that zero-RPM bracket. When it does eventually get spinning though, the 140mm fluid dynamic bearing fan runs very quietly as there's almost no contact between the fan and the bearing, resulting in near-zero friction. The HX1200i also comes with a PCIe 5.1 12V-2x6 GPU cable, for use with the latest graphics cards, including the NVIDIA GeForce RTX 50 Series.

If you don’t feel you need any extra wiggle room for future upgrades, then it can make sense to focus on just what you absolutely need to keep the costs down. This 850W PSU still lays claim to a Cybenetics Gold rating meaning you’re getting a high-efficiency unit for your money.

The RMx SHIFT 2025 Series also come with a few creature comforts: A manual fan control knob for those who like to take matters into their own hands, a recessed power switch to lessen the chance of accidentally cutting power, and of course a native 12V-2x6 cable for the titular 5080.

Given the slightly confusing state of the 12V-2x6 / 12VHPWR standards, we've made a couple infographics for you. These explain the difference between these two standards, and tell you how to safely power a 50-series card with your CORSAIR PSU, even if it doesn't have a native 12V-2x6 connector.

Still not quite sure which PSU is best to pair with your 5080? Here's some useful tools to help you make the right decision:

• PSU Calculator - Choose your GPU and CPU, answer a few quick questions, and we'll suggest the best few PSU options for your setup.
• PC Builder - Get instant hardware recommendations, size guides and compatibility checks for your full PC build, including your Power Supply.

Alternatively, we also offer a full range of Prebuilt RTX 5080 Gaming PCs built with world-class CORSAIR components to help you instantly get the most out of the next-generation of NVIDIA GPUs.

Note - our prebuilt 50-series PCs are only available in the US.