The AMD 5830 GPU was to have launched on January 25, 2010. As we reported earlier, the reason for the delay was that a problem on the circuitboard was triggering an error when it underwent testing. Now more details about the 5830 have been revealed. The 5830 is to have 1280 unified shaders running at 750 MHz, 64 texture mapping units, 32 render output units, and 1 GB of GDDR5 memory running at 1 GHz. As a comparison, the more expensive 5850 has 1440 unified shaders running at 725 MHz, and 1 GB of GDDR5 memory running at 1 GHz. The 5850 sells for about $300 on NewEgg. From the article:

… the card should cost around 215€, or about 17% less than the average HD 5850 card on the other side of the Atlantic. This means that, if accurate, and the same price relationship is retained for the U.S. market, the upcoming card could sell for around $250.

via : Unannounced Radeon HD 5830 price and specs revealed