"In complementing the recent Intel Iris Graphics 5100: Windows
8.1 vs. Ubuntu 14.04 and MacBook Air: OS X 10.9 vs. Ubuntu 14.04, here's
some new Windows vs. Linux OpenGL benchmarks with this time looking at
the performance for Intel's "Haswell" Core i7 4770K with HD Graphics
4600 using the latest driver releases on Windows 8.1 and Ubuntu 14.04 LTS."
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