Last week, due to some unexpected circumstances, we were able to post a sneak peek of the RV770 GPU and ATI Radeon HD 4850 graphics card.  As our limited testing showed, the Radeon HD 4850 was quite promising for a $199 graphics card.  But we weren’t able to tell the complete story.  While the initial benchmarks definitely looked good, there was a lot more to talk about in regard to the Radeon HD 4850 and the RV770 GPU at the heart of the card.Today we can finally spill the rest of the beans.