i7-4820k speedstep disabled FFmpeg 1
Intel Core i7-4820K testing with a ASUS P9X79 and AMD Radeon HD 7900 3072MB on Ubuntu 13.04 via the Phoronix Test Suite.
HTML result view exported from: https://openbenchmarking.org/result/1309192-RA-I74820KSP72.
FFmpeg
H.264 HD To NTSC DV
Phoronix Test Suite v10.8.4