SilverStone created the Essential series power supplies to provide enthusiasts with an affordable choice when building PCs. ET650-B and ET550-B have 80 PLUS Bronze efficiency with single +12V rail and the ability to provide 24/7 40℃continuous output. In addition, they are equipped with low-noise 120mm fan and all-black flat cables for easier management. Even high-end systems with powerful graphics cards can be powered easily by Essential series PSUs' standard 8pin / 6pin PCI-E connectors, making them an outstanding choice for those seeking the most value and performance for their money.