Driverheaven posted a review on the Sapphire Radeon 4850 X2
A quote from the article:
>> Sapphire Radeon 4850 X2 Review
Today we are going to look at the HD4850 X2, an exclusive beast from Sapphire set to slot in directly below the class leading 4870 X2, a card which has scooped our highest awards in several reviews. We have high hopes for the new Sapphire board as the single core 4850 has been a big success in the enthusiast market with a potent combination of great value for money and strong performance.
>> Sapphire Radeon 4850 X2 Review