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Product Description The Cooler Master GX range of power supplies feature a single powerful +12V rail that has been designed to deliver more than ample power to dual graphics card systems, no matter if you use SLI or CrossFireX. On top of this you also get a wide range of other high-quality Cooler Master features which makes the Cooler Master GX range the ideal solution for your system. Technical Specifications Form Factor: ATX 2.31 Dimensions: 150*140*86 mm Rated Power Output: 550w Efficiency Rating: 80+ Modular: No Features: Ultra-silent operation with intelligent 120mm fan speed control Single 12V rail for most demanding SLI configurations Connectors: 1x 20+4 Pin Motherboard 1x 4+4 Pin CPU 2x 6+2 Pin PCIe 6x SATA 3x Molex Peripherial 1x Mini-Molex (floppy)