It's only been three months into the year 2006, but the next generation of graphics chipsets are already here. This time around, the first salvo is from ATI, in the form of the Radeon X1900 series formerly known as R580. When the very late Radeon X1800 came out several months ago, most people agree that the chip to watch out for is not the Radeon X1800 (or R520) but the R580. Architecturally, the two are very similar, but the R580 is equipped with more shader units per pixel pipeline than the R520 - 48 shader units in all.

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