Every two or so years, AMD rolls out a year-end Catalyst driver update, which steps up not just performance, and splats bugs, but also expands the software feature-set. The new Catalyst 14.12 Omega is part of AMD's effort to catch up with NVIDIA's latest software features, and get ahead with some.
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