enthusiast.hardocp.com – ASUS is known as the one of the largest and most successful motherboard manufacturers in the world, but they make more than just motherboards. They also offer graphics cards, notebooks, netbooks, optical drives, handheld PCs, and many other computer hardware accessories.
This article will focus on a brand new addition to their video card lineup: The ASUS EAH4890, featuring the new AMD Radeon HD 4890 GPU and 1GB of GDDR5 memory.
(…) Today, AMD is officially launching an update for spring of 2009, with the Radeon HD 4890. This video card is powered by AMD’s ATI RV790 GPU, which is an updated version of the RV770 which powers the Radeon HD 4870 and 4850 series’ of video cards.

Source