Power Supply

We have finalized our testing and put together a list of the top three power supplies for the RTX 4090.

Buying an RX 7900 XTX? Be sure to get the right PSU for it by following this guide on the Best PSU For RX 7900 XTX.

The Silverstone Hela 850R Platinum is a high-performance, efficient power supply unit that stands out with its adherence to the latest ATX 3.1 specifications. It features the new 12V-2x6 GPU connector, improving safety and reliability. In our tests, the PSU delivered impressive results, showcasing excellent voltage regulation, high efficiency (up to 94.23%), and exceptional voltage ripple performance.

The Corsair HX1000i PSU, part of the top-tier HXi series, offers a robust 1000W output and complies with ATX 3.0/3.1 specs. Its design features high-quality Japanese components and a quiet fluid dynamic bearing fan.

The Corsair RM850e is an affordable ATX 3.0 PSU perfect for budget-conscious gamers, delivering solid performance and reliability. While it uses non-Japanese capacitors and a rifle bearing fan, it still offers impressive efficiency and acceptable voltage regulation.

The Enermax PlatiGemin 1200W Platinum takes the crown with its robust build, top-tier efficiency, and exceptional performance. It has a fully modular design, premium mesh-sleeved cables, superior voltage regulation, and excellent thermal management.

The Enermax D.F. 12 Revolution 850W PSU offers compact design, advanced ATX 3.1 features, and impressive performance. It's perfect for compact builds, featuring a 115mm dual ball bearing fan with Dust Free rotation, high-quality Japanese capacitors, and a fully modular design.

The Corsair HX1200i offers excellent voltage regulation and ripple performance, making it ideal for overclockers and high-end system builders. While its efficiency is slightly below expectations for a Platinum-rated PSU, its superior voltage ripple control and solid thermal performance make it a strong contender in the market.

The XPG Fusion 1600W Titanium PSU, designed with Delta Electronics, offers top performance and innovation. Featuring GaN MODFETs, it supports multi-GPU setups with dual 12VHPWR connectors and full software control.

The Corsair SF1000L PSU is an SFL power supply that exceeds expectations with its performance and efficiency. Slightly larger than SFX PSUs, it offers better results under max load due to improved heat dissipation.

The XPG Core Reactor II VE 850W delivers future-proof compatibility with ATX 3.1 compliance, exceeding 80Plus Gold efficiency for top-notch energy savings. While 3.3V and 5V rail performance is only mediocre at best, it prioritizes affordability and overall performance for casual and serious PC builders alike, with noise levels increasing and performance taking a dip under high temperatures or near full capacity

The MSI MPG A850G PCIE5 PSU is a compelling option that balances performance, reliability, and aesthetics. While the $199 price tag may seem somewhat steep compared to similar PSUs, the MSI MPG A850G PCIE5 justifies its cost with a 10-year warranty, high-quality Japanese capacitors, along with other features, makes it a worthwhile investment for users looking for a high-quality, future-proof PSU for their gaming PCs.