Just over a week ago ATI launched the Radeon HD
4830 which is the latest card in the 4800 series
range and hits the market at around £99/$130.
Unfortunately, due to a BIOS issue on the first
batch of review sample cards (reference models
and some retail branded) the full number of
unified shaders was not available and performance
was therefore negatively impacted (some reviews
you have already read on other publications are actually wrong).

http://www.driverheaven.net/reviews.php?reviewid=654


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