HotHardware.com posted a review on the Radeon HD 4850
With the recent run of newer and more affordable graphics cards from ATI, it's almost easy to forget that there's already a sub-$200 frame-rate cruncher called the Radeon HD 4850. Based on the same RV770 chip as the more powerful, yet more expensive HD 4870, the HD 4850 ships with the same 800 stream processors, 40 texture units, and 16 ROPs that have made these cards such hot items. The main area where they differ, other than clock speeds, is in regard to memory. While the HD 4870 ships with high-end GDDR5 memory chips, the HD 4850 finds itself loaded with 512 MB of more mainstream GDDR3.HIS and Sapphire Radeon HD 4850 Face Off
A major caveat with the Radeon HD 4850 that has arisen, however, is the excessive heat that gets produced by the RV770 GPU. It seemed the single slot reference cooling solution had a tough time handling the heat output of the RV770. With heat being a concern, and manufacturers having more time to tinker with their cards, we weren't surprised to find out that two of ATI's major partners, HIS and Sapphire, had two new cards waiting in the wings, each with their own ramped up clock speeds and with some superior cooling thrown in as well. Come on by the site and check out the Sapphire Toxic Radeon HD 4850 512M and HIS Radeon HD 4850 IceQ4 TurboX...
