best atx 3 psu

Best ATX 3 PSU 2024: The next generation of power supply

What is the best ATX 3 power supply money can buy?

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Hardware customizations on desktops are inevitable in today’s digital world, especially for streamers and avid PC gaming fans. The power supply unit, or PSU, is one of the essential components on your build that you may also need to upgrade.

The most relevant PSUs nowadays are the Small Form Factor (SFX) or the Advanced Technology eXtended (ATX), patented by Intel. Also, Intel released a new power supply standard last year, dubbed the ATX 3.0 or ATX 3. This guide will detail what the ATX 3 is on PSUs and the best power supplies that have adopted this standard.

Read this guide to know more.

Do You Need an ATX 3 PSU?

The ATX 3.0 was introduced in 2022 by Intel as the ATX Version 3.0 Multi-Rail Power Supply Design Guide. This document mainly focused on bringing a more efficient, durable, and stable power supply that can deliver up to 600W of power. 

PSUs that follow the ATX 3 standard are tolerant of “power excursions”—or simply, power spikes that can occur when utilizing high-voltage graphics cards. They also have the latest PCIe 5.0 12VHPWR connector, which negates the need for more power cables and streamlines them in one stable connection to the GPU.

Whether you’ll need a new PSU that follows the ATX 3.0 standard can depend on your current components, especially your GPU. If you’re aiming for an RTX 3090 or one of the latest NVIDIA GeForce 40 Series cards, switching to an ATX-ready PSU may be ideal for keeping your build future-proof and compliant with various power requirements.

Best ATX 3 PSU: MSI MEG Ai1000P PCIe 5

MEG Ai1000P PCIE 5 & ATX 3.0 Gaming Power Supply

Product Dimensions

‎3.26 x 2.43 x 5.08 inches


‎1000 watts


80 PLUS Platinum, Cybenetics Platinum (89-91%)


Cybenetics Standard++ (30-35 dB[A])

One of the newest PSUs that follow the ATX 3.0 standard is the MSI MEG Ai1000P PCIe 5. It has a continuous power of 1000W at an 80 Plus Platinum rating, which means it can deliver up to 92% efficiency under normal loads. It also features a fully modular cabling design and a quiet hydraulic bearing fan.

Since it’s ATX 3.0-ready, it comes with the latest 12VHPWR cable, among other connectors, for new-generation GPUs. However, this can be an expensive PSU choice for medium-tier builds.

Another great ATX 3 PSU: Gigabyte UD1000GM PG5

Gigabyte UD1000GM PG5 V2 1000W Power Supply

Item Weight

‎5.68 pounds

Product Dimensions

‎5.91 x 5.51 x 3.39 inches

Max. DC Output



80 PLUS Gold, Cybenetics Platinum (89-91%)

Another ATX 3.0-ready option that you can consider is the Gigabyte UD1000GM PG5. It features a fully modular design and durable capacitors from Japan. It’s also built-in with the newest 12VHPWR connector for the latest and high-performance GPUs.

While Gigabyte doesn’t directly claim that the PSU is ATX 3.0-ready, it still has the fundamental features for the standard and is a suitable option for future GPU upgrades. The UD1000GM can deliver up to 1000W at 80 Plus Gold efficiency. It also features a smart hydraulic bearing fan for effective cooling.

Final word

The MSI MEG Ai1000P PCIe 5 brings the best value from the two PSU choices we’ve mentioned. Although it’s a more expensive choice, it’s ATX 3.0-ready and can support the latest GPUs, making it a future-proof power supply. The MSI MEG Ai1000P is the best ATX 3 PSU overall due to its power efficiency and various available connectors. This power supply is up there with the best new generation PSUs from the likes of NVIDIA.

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