With the launch of the new Radeon Software Crimson Edition AMD has announced that Legacy Graphics Products will no longer be supported. Only AMD Graphics Core Next (GCN) products will see regular WHQL and Beta updates in 2016.
“AMD Radeon™ HD 8000 Series (HD 8400 and below), Radeon™ HD 7000 Series (HD 7600 and below), Radeon™ HD 6000 Series, and Radeon™ HD 5000 Series Graphics products have reached peak performance optimization as of November 24th, 2015.These 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.”
Source: http://support.amd.com/en-us/download/desktop/legacy?product=legacy3&os=Windows+10+-+64
For the Legacy products there is a Radeon Software Crimson Edition Beta which can be found here: http://support.amd.com/en-us/kb-articles/Pages/AMD-Radeon-Software-Crimson-Edition-Beta.aspx