Did you select the correct driver download? Looking at AMD's site they have the driver downloads split up into categories of cards, with the 6000 series being a legacy product. You have to select the correct O.S. under this header for your driver:
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Radeon™ R5 235X, R5 230, R5 220, HD 8470, HD 8350, HD 8000 (D/G variants), HD 7000 – HD 7600, HD 6000, and HD 5000 Series
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Hope this helps