Corsair AX1600i 1600W Power Supply Review

1600 watts is a lot of computer power supply to shoehorning into one small box. We have seen this attempted many times, and many times companies have fallen short. Corsair's new flagship AX1600i claims to be the world's best PSU that has gotten even better. We will be the judge of that and judgement has been passed.


Corsair is known in enthusiast circles as a supplier of high performance memory and has risen to become one of the most talked about power supply brands around. Corsair was initially able to establish a presence in such a short time through the use of quality OEM’s (Seasonic and CWT), rigorous standards, and excellent support. Since its entrance into the PSU field, it has established a number of lines of power supplies of varying quality to address (and overlap) just about every market segment. Today, Corsair brings us another product from their AXi line; the flagship AX1600i ( CP-9020087-NA ). This power supply is once more produced by Flextronics.

Flextronics International Ltd. is an electronics manufacturing services provider, which makes it a bit atypical from the general consumer SMPS OEM, founded in 1969 and headquartered in Singapore. Flextronics provides a wide range of manufacturing, supply chain management and procurement, logistical support, and technical support services for industries ranging from automotive, to medical, to consumer electronic, and industrial component production. Some of its more familiar customers that it provides manufacturing services, or outright production for are familiar to many users including Lenovo, Lego Group, Microsoft, RIM, LG, SUN, HP, Kodak, Verizon, Amazon, Samsung, Siemens, Apple, and many more. Flextronics subsidiary FlexPower, was founded in 2005 and Flextronics claims that following the acquisition of Friwo and Coldwatt, plus internal growth and development that it is now the "4th largest power supply company in the world." However, its production of products for the consumer SMPS market is still rather limited with Corsair bringing the first product from Flextronics/FlexPower to the enthusiast we have seen to date.

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The World's Best Power Supply This Time Around?

It has been a little over 3 years since we have seen a Corsair AXi power supply. At that time, the unit we saw from the AXi line was the AX1500i which represented the flagship product from Corsair. However, that product was not without some issues which kept it from reaching its full potential and being that true flagship unit in Corsair's product portfolio. So, it will be of great interest today to see how the AX1600i does as it is again coming in as the flagship product from Corsair on the heels of that AX1500i. As always, flagship products carry flagship expectations but, given what we saw from the preceding unit, the AX1600i may have a bit more weight on its shoulders today as it tries to solidify that flagship status. Now, before moving on to our evaluation of this product to see how it carries that burden, let's see what Corsair has to say about this unit today:


The CORSAIR AX1600i is the ultimate digital ATX power supply, built using only the best components and state-of-the-art gallium nitride transistors to deliver more than 94% efficiency.

Moving on let's see what we can expect when a user purchases the Corsair AX1600i supply in retail in terms of documentation, accessories, cable count, rail layout, output characteristics, and general build quality.