The video chip RV670 physically has 64 stream processor, but the presence of super-scalarity allow AMD to speak about five times larger number of stream processors.
Analogous situation appears also with RV770 chip , physically it has only 160 stream processors. Super-scalarity allows AMD (for marketing purposes) to multiply this quantity by five (800 pieces).
Here is the description of video card radeon HD 48xx characteristics . Here we have the references about the presence of 800 stream processors .
The frequency characteristics video card: 625/2000 MHz for Radeon HD 4850 with 512mb GDDR-3 memory , and 750/3600 MHz for Radeon HD 4870 with 512mb GDDR 3 memory .
According to some data, the video card radeon HD 48xx can exceed its predecessors on base of RV670 chip by more than 50 %. Related Products :
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