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. If you like our content, please support HardOCP on Patreon.