With last week having delivered our latest Linux vs. Windows NVIDIA benchmarks where we found that the NVIDIA Linux driver can outperform the Windows 8.1 driver with OpenGL workloads, the tables have turned to looking at the AMD Windows vs. Linux performance using the latest code. In this Ubuntu 14.10 vs. Windows 8.1 comparison, the open-source Radeon driver on Linux is also being tested against the Catalyst drivers."
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