"Unless you've been living under a rock, you would know that the release of the Catalyst 11.4s has been anticipated as one of the most significant ones from AMD in many months. We've actually been using the 11.4 driver for months in the form of the HD 6990 Beta and new models that launched after the HD 6990 carried with them slightly modified versions of the 11.4.
Today, though, we've got a WHQL version and we'll of course be comparing it to the 11.3 driver which while we thought was better than the 11.2s, wasn't as much of a stand out as the 11.4 betas that we'd been using."
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