This is based on a killer Seasonic design, and its cheaper - whats the catch? Fractal Design are launching a new power supply range today, the ION SFX. This new range of power supplies will be offered in two capacities – a 500W and a 650W model. As the name would suggest this new design is 80 Plus Gold certified, fully modular and ships with Fractals new ‘UltraFlex’ cable design.