[SOLVED] Black screen at load

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http://ubuntuforums.org – Greetings! I want to try Linux, but when I boot into Ubuntu I always get a black screen. After my bios loads, I'm asked if I want to boot in Win 7 or Ubuntu. I choose Ubuntu, the screen flashes purple for a second, and then I'm stuck at the black screen. Any thoughts? I'm using an AUSUS GTX 570 GPU with current drivers, and I'm trying to use the 64 bit version od Ubuntu. (Hardware)