KITGURU SHORTLISTS: THE BEST POWER SUPPLY OF 2025

A high-grade Full Bridge LLC architecture with synchronous rectification and DC-DC topology ensure that power remains consistent and efficient across the full load range. We measured close to 95% peak efficiency which is exceptional and one of the best results we have seen in our labs.

The new Corsair HX1500i Shift builds on previous models and brings new features to the table. It supports the latest ATX 3.1 and PCIe 5.1 platforms and the side-mounted connectors and built-in iCUE LINK System Hub offer more options for enthusiast system builders.

The Ion 3 Gold really excels in regards to noise output, the inclusion of a noise tuned Fractal Momentum 14 fluid dynamic bearing fan has really helped improve the overall performance of this supply. Most of the time you wouldn't even know it was turned on, and it's only in the last 25% of total power output that the fan spins up enough that you can hear it. It never is intrusive, and it's one of the finest power supplies in regards to fan-tuning that I have tested this year.

As a flagship model, I have nothing but praise for the design, build quality and attention to detail. The Mega TI 1650w passed all the technical tests in our suite over the last few weeks and the incredibly high levels of efficiency combine well with the very low fan noise throughout most of the power range. The profile of this fan has been very well set up at the factory based on their internal data.

The Seasonic Prime TX-1600 Noctua Edition may have an almost identical design to the original Seasonic version we reviewed a little while ago, but the new grille design, state of the art fan implementation and clever fan curve mean this power supply is one of the quietest we have tested. The fact it can withstand 1600 watts while generating almost no audible noise is remarkable.