It looks like AMD plans to release the ATI Radeon HD 5830 on January 25th, 2010. This new card will offer Radeon HD 4890-like performance, but at a lower price.
More precise specs (shader processors or clock frequencies), remain unknown. Radeon HD 5830 will use GDDR5 memory and offer performance on the line of AMD's Radeon HD 4890 card, but at a lower price.
We're guessing the design will be the same as the more powerful brothers, but even if the price hasn't been set it would be nice with a card from the Radeon HD 5800 series that costs less that $200.
We can't wait.
