Basis for the increased frequencies is the 55 nm production process, which has been quite perfected by now. 850 to 900 MHz appear to be possible for the RV790 GPU; the RV770 of the HD 4870 is clocked to 750 MHz. As the GDDR5 memory of the HD 4890 (Single) is regarded, AMD wants to reach 3,900 million transactions/s - RV770 based cards reach 3,600 MT/s. Those numbers indicate an increase in gaming performance of 8 to 20 percent, depending on game and sequence.There's also a rumor about a dual-GPU Radeon HD 4890 X2 card, but it's unknown if AMD will invest time and money in such a prestige project. Perhaps an add-in board partner like Sapphire will be willing to launch such a card, like they did with the Radeon HD 4850 X2.
ATI Radeon HD 4890 and Radeon HD 4890 X2 on the way?
Posted on Friday, March 06 2009 @ 19:54 CET by Thomas De Maesschalck