Excerpt: Remember the Radeon HD 5830? That videocard filled a certain price point, but it was actually the same GPU used in the high-end HD 5870, with a large chunk of the die disabled. The net result was a graphics card that was physically bigger than the intermediate HD 5850 and used more power. And although it cost less, performance really wasn’t up to snuff for the target price point. Enter the Radeon HD 6790. At first blush, it’s similar in concept to the HD 5830.
Pros: A step up from the old HD 5770; just $150.
Cons: Uses more power than an HD 6850; needs to cost just a little less.