The HD 4830 actually performs better than I thought it would; it manages to perform at up to 1920 x 1200 with anywhere from similar performance to around 20% slower. With a price difference of about 10% to 20%, depending on the brand, it's going to be a hard decision deciding what card to purchase.
Let's break it down into the pros and cons of the card. First, the cons; ultimately the card is not going to be as fast as the HD 4850, but that was never expected. The other thing is depending on brand, it's not all that much more expensive to move to the HD 4850 which is faster.
On the pro side of things, there's the fact that the card manages to perform quite similar to the HD 4850 at resolutions of up to 1920 x 1200, meaning if you're playing at that resolution or lower, the card's a fairly good buy. Then there is of course the fact that the card manages to use less power, run cooler and make less noise than the HD 4850; all very big pluses for a lot of people.
I have to admit that I was going into this review with a pretty negative attitude; I really thought it was going to be one of those cards that carries the name of its higher end brothers but put's out performance of something much lower. I was surprised to say the least and the HD 4830 is ultimately a pretty good card.