I know some of you might want to say that HD4890 is just an overclocked version of HD 4870, but the test results is somewhat convincing. It shows a pretty good improvement in comparison with HD4870. The score on 3DMark06 is very close to GeForce GTX 285, but not on 3DMark Vantage because of the advantage of PhysX that GTX 285 has taken. Will HD4890 be fast enough to compete with GTX 285 in gaming? guess we'll have to see some more test results to be able to tell.

http://www.ocheaven.com/news_view.asp?gid=6754