The Guru of 3D posted a review on the AMD Radeon HD 4850
A quote from the article:
>> AMD Radeon HD 4850 Review
A pretty hectic day today as AMD moved forward the launch of the Radeon HD 4850 (initially to be released next week). Today Guru of 3D will review both the PowerColor and Force3D graphics cards in a full fetched review. As the tests will show, this little 199 USD gem will pack an awful lot of performance.
Not only will we put it though the benchmark paces, Guru3D will also have a look at Crossfire performance among these two cards combined. The results are pretty surprising.
You can read the 20 page article right here
>> AMD Radeon HD 4850 Review