AMD's new Radeon HD 4830 is positioned to fill one of the last gaps in the GPU market price ranges. While the HD 4670 has a tight grip on the sub-$100 market and the HD 4850 is a great choice in the sub-$200 range, AMD felt there was something missing in between $100 and $200. Considering price/performance, the HD 4830 is one of the best offers on the market today only rivaled by some low-end NVIDIA cards.
What makes this card even more attractive is the massive overclocking potential we saw on our samples. Both cards easily went beyond 750 MHz core speeds which is more than 30% overclock. AMD's choice to reuse the fan of the HD 4830 seems right to me. The card is very quiet, while still running at acceptable temperatures under load.
AMD's HD 4830 may not be the super gaming card that can handle the highest detail settings at all resolutions, but for gamers on a small budget, running at 1280x1024 for example, it is a great choice.
Unfortunately there is one major issue at this time. The sample we received from AMD is missing 80 shaders, for more info read this article.