[ubuntu] Video Card Recommendation

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http://ubuntuforums.org – So I'm running Ubuntu 12.10, and I use Linux exclusively on all my machines because I prefer it, and don't really have a need to have Windows installed. Lately, especially since the release of Steam for Linux, I've been using my Ubuntu desktop PC for more and more gaming on Linux, but I've had one issue. For most of the games I have, including a lot of older 3-D games, my on-board AMD graphics card with the open source drivers works fine, however it is old enough and low-end enough that AMD doesn't support it any more with the Linux version of their driver. I'd like to pick up a more powerf (Hardware)