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AMD had bought graphics chip manufacturer ATI for $5.4 billion back in 2006., in one of the biggest acquisitions ever in the semiconductor industry, and internally, ATI was renamed to AMD Graphics Product Group.
However, due to the strength of the ATI brand (and the long-time rivalry with competitor Nvidia), the ATI name survived to this day, often causing tech journalists trouble as they had to squeeze three brand names - AMD, ATI and Radeon - in one title.