Equipped with a new generation of design and components, the Element ST50EF continues SilverStone’s stride toward more efficient power supplies. With higher than 80% efficiency, the ST50EF produces less wasted heat than typical power supplies and allows the included 120mm fan to operate at very low speeds, ensuring quietness at all times. This stable output and efficient characteristics are packed inside an environmentally-friendly casing that is compatible with nearly any ATX casing on the market. If strong power for dual core/dual video card processing and quietness are the main priorities, the Element ST56EF is for you.