Tweaknews posted a review on the Sapphire Radeon HD4850 X2 2Gb Video Card
A quote from the article:
>> Sapphire Radeon HD4850 X2 2Gb Video Card Review
So did Sapphire fill a niche void and provide a card to the consumer that wanted a dual core card without the killer huge price? You bet. This card at around US$275-$300 at the time of this review is a great deal and will have anyone enjoying the latest games with higher resolutions and quality settings while still providing decent framerates. Although this is no HD4870 X2 killer by any means, it does hold it own when it comes to your performance dollar.
>> Sapphire Radeon HD4850 X2 2Gb Video Card Review