Phoronix published a review on the Ubuntu 14.04: Intel's Haswell Linux Driver Comes Up Short Of Windows
A quote from the article:
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.Ubuntu 14.04: Intel's Haswell Linux Driver Comes Up Short Of Windows @ Phoronix
This week on Phoronix are fresh benchmarks using the latest open and closed-source drivers for Intel HD Graphics, AMD Radeon, and NVIDIA GeForce hardware from a desktop with the popular Intel Core i7 4770K processor. The same system hardware was used throughout testing. For this article today the HD Graphics 4600 are being benchmarked under Windows 8.1 Pro x64 and Ubuntu 14.04 LTS x86_64.