Linux 3.9 To Linux 4.9 Kernel Benchmarks: Testing The 21 Last Kernels
These days the Intel OTC developers are mostly focused on Skylake hardware and newer.
Furmark actually seems to be the fastest on Linux 3.11~3.14 kernels, but then again this is a synthetic test.
Not much change at all for the triangle OpenGL test that's mostly limited by video memory bandwidth.