Bigbruin.com has posted a review on the Sapphire Radeon HD4830 512MB Graphics Card

I am not exactly sure how I expected the Sapphire Radeon HD4830 512MB graphics card to fare during testing, but it wound up looking more like an enthusiast grade card than an entry level offering. It should be able to handle just about any game without having to sacrifice too much in terms of frame rates or settings, making it a great option for the gamer on a budget.

Sapphire Radeon HD4830 512MB Graphics Card Review