After upgrading the drivers from bootcampdrivers.com on my 21.5 inch mid 2011 iMac, the display driver says "AMD Radeon 6600M and 6700M series", while it said "AMD Radeon HD 6750M" before. Any
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Download and install Advanced Micro Devices, Inc. AMD Radeon 6600M and 6700M Series - driver id 19649