Corsair enters the SFX PSU market with its new SF series consisting of two models at 450W and 600W capacities. Both power supplies are fully modular, promise high performance and come with 92mm fans to minimize noise output. Except for SilverStone, most companies don’t seem to care much about the SFX form factor. This is changing though, as Corsair recently introduced its SFX-based SF series. There are currently only two models, hitting the 450 and 600W capacity points (we’d really like to see the company come out with something under 400W too). Both SF units are 80 PLUS Gold-certified and feature fully modular cabling to simplify installation. In addition, Corsair implements a semi-passive mode called Zero RPM, which deactivates the fan under light loads to enable silent operation. A larger 92mm fan is used to further suppress acoustic output. In comparison, most SFX power supplies employ 80mm fans that spin faster, creating more noise. Finally, Corsair is only using Japanese capacitors, assuring you get years of trouble-free use from the SF-series PSUs, which are also backed up by a seven-year warranty. In this review, we’re evaluating the lower-capacity SF45...