Enermax has just expanded their NAXN 82+ series of power supplies with the 80 Plus Bronze certification to include three new models, 450 W, 550 W, and 650 W. (This series also has 750 W and 850 W models.) However, you need to pay attention, as Enermax also has two other series called NAXN, the "plain" NAXN, also known as Tomahawk II, featuring 350 W, 450 W, and 500 W models, with no 80 Plus certification, and the NAXN 80+, featuring 350 W, 450 W, 500 W, and 600 W models, with the standard 80 Plus certification. To make things more confusing, the 550 W model that we are reviewing is sold as "NAXN" (and not "NAXN 82+"). Anyway, let's see if this new power supply is a good pick.