AMD will be moving the AMD Radeon HD 2000, AMD Radeon HD 3000, and AMD Radeon HD 4000 Series of products to a new driver support model. We will continue to support the mentioned products in our Catalyst releases, but we`re moving their updates to a quarterly basis, whereas our AMD Radeon HD 5000 and later products will continue to see monthly updates. The Quarterly Catalyst releases will focus on resolving application specific issues and critical updates."
Any major computer upgrade generally requires a full software reinstall too. No so if you heed the advice in the guide to Upgrading a Motherboard without Reinstalling. PCSTATS Tips