Your AMD Graphic card is not supported by AMD anymore. It is considered LEGACY (old).
AMD Radeon™ Software Support for Legacy Graphics Products
AMD Radeon™ R5 235X, Radeon™ R5 235, Radeon™ R5 230, Radeon™ R5 220, Radeon™ HD 8470, Radeon™ HD 8350, Radeon™ HD 8000 (D/G variants), Radeon™ HD 7000 Series (HD 7600 and below), Radeon™ HD 6000 Series, and Radeon™ HD 5000 Series Graphics products have been moved to a legacy support model and no additional driver releases are planned. This change enables us to dedicate valuable engineering resources to developing new features and enhancements for graphics products based on the GCN Architecture.
As a courtesy to our valued supporters we are providing a final Beta driver together with the release of the AMD Radeon Software Crimson Edition. The AMD Radeon Software Crimson Edition Beta driver includes the redesigned user interface as well as some enhanced features. More information can be found in the AMD Radeon Software Crimson Edition 16.2.1 for Non GCN Products Release Notes. This driver is provided "as is" and will not be supported with further updates, upgrades or bug fixes.
For users looking for a WHQL certified driver, the AMD Catalyst™ 15.7.1 driver will continue to be available for users running Windows® 10, Windows® 8.1, and Windows® 7.
Here the Support page with the last driver where I copied the above statement from AMD : Legacy