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Corsair AX1500i 1500w Power Supply Review and Unboxing

Corsair AX1500i 1500w Power Supply Review and Unboxing


Unveiled at CES, the Corsair AX1500i is one of the first power supplies to really create a buzz. The flagship 1,500 watt power supply aims to deliver clean power even at insane power outputs. The power supply is one of the most technologically-advanced power supplies currently out on the market and is definitely going to take over the high-end enthusiast market.

Key features include:

  • Seven year warranty
  • 80 PLUS Titanium rated
  • 1500 Watts continuous power
  • Zero RPM fan mode
  • 140mm fan size
  • Corsair Link support
  • 150mm x 86 mm x 225 mm
  • Fully modular
  • Slim cables


The AX1500i is capable of delivering up to 1,500 watts of continuous power with 125 amps on the +12v rail. To put that into perspective, a mainstream 750w from Corsair (RM 750) delivers only 63 amps on the +12v rail.


Courtesy of Corsair

Corsair AX1500i Digital ATX Power Supply

AC Input Rating DC Output Rating
AC Input: 100V - 240V DC Output +3.3V +5V +12V -12V +5Vsb
Current: 15A Max Load 30A 30A 125A 0.8A 3.5A
Frequency: 50Hz - 60Hz Maximum Combined Wattage 180W 1500W 9.6W 17.5W
Total Power: 1500W


Corsair’s packaging has always been top notch. The power supply comes enclosed in a large cardboard box with a flap on the outside showcasing all of the features of the power supply. Inside the box, you’ll find the power supply hidden between two pieces of thick foam as well as the power cable and Velcro bag with all of the modular cables.

Considering the size of the power supply, it’s great to see that Corsair went with a fully-modular design. As opposed to permanently attached cables, the AX1500i uses slim-straight cables that are detachable so you can install only the ones that you need. This makes for a much cleaner overall build and can help with airflow as there isn’t as many cables floating around.

If you’re wondering who this power supply is for, it’s really meant for users who are running 4-way GPU setups or are utilizing other expansion cards that consume tons of power. For example, a system with quad-fire R9 295X2 will definitely benefit from the power efficiency of the AX1500i.

Courtesy of Corsair

With the included USB COMM port cable, you can connect the AX1500i to the motherboard to fully monitor your power supply with the Corsair Link software. Inside, you can view power input, power output, efficiency and even the temperature inside the power supply in real time. It is even possible to change the power supply to either run on a single-rail or multiple virtual rails.

The back panel of the AX1500i uses a honeycomb design for exhaust and utilizes a rectangle power outlet as opposed to the standard plug due to the higher power draw.

The front panel of the power supply is where all the magic happens. This is where you will find all of the modular power connections as well as the COMM port for Corsair Link. There is also a self-test button to make sure that the power supply is in working condition.

Test Data

Because we don’t have the proper equipment on hand to test the power supply, we are going to use the numbers from PCPerspective to give us a better look.

Courtesy of PCPerspective

When testing load regulation it was found that under any load, the AX1500i produced an extremely clean signal and had great voltage regulation regardless of the output wattage. According to PCPer, the numbers that the AX1500i produced were some of, “the best voltage regulation numbers [they] have seen from any power supply tested to date!”

Courtesy of PCPerspective

In addition, there was very little AC ripple. All of the numbers were well below the ATX guidelines and matched the numbers provided by Corsair.


In conclusion, we must say that this is the best power supply that we have ever seen. It’s one of the first to feature an 80 PLUS Titanium rating with a 1500 watt output and is solidly built. Although the $450 price tag is quite high for a power supply, you have to realize that you are getting for your money. The 7-year warranty and quality components make this an easy sell for those building top-end gaming computers.

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