AMD?s New ATI Radeon HD 4890, The RV790 Unveiled

hothardware.com — Although it?s technically very similar, ATI's RV790 differs from the RV770 in a number of ways. The RV790 at the heart of the Radeon HD 4890 is a new chip that is comprised of more transistors than the RV770 (959M vs.956M) which are dedicated to updates made to the core to support higher clock speeds. According to AMD, the entire chip was re-timed. Apr 2, 2009 View in Crawl 4