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Intel Core i7-3960X testing with a ASUS P9X79 PRO and eVGA NVIDIA GeForce GTX 1080 Ti 11264MB on Gentoo/Linux via the Phoronix Test Suite.


Intel Core i7-3960X: 

	Processor: Intel Core i7-3960X @ 5.70GHz (12 Cores), Motherboard: ASUS P9X79 PRO, Chipset: Intel Xeon E5/Core, Memory: 64512MB, Disk: 240GB INTEL SSDSC2BW24 + 1024GB Samsung SSD 960 PRO 1TB, Graphics: eVGA NVIDIA GeForce GTX 1080 Ti 11264MB, Audio: Intel C600/X79, Monitor: DELL U2711, Network: Intel 82579V Gigabit Connection

	OS: Gentoo/Linux, Kernel: 4.13.4-gentoo (x86_64), Compiler: GCC 5.4.0 + Clang 3.9.1 + LLVM 3.9.1, File-System: ext4, Screen Resolution: 2560x1440

-Ofast: 

	Processor: Intel Core i7-3960X @ 5.70GHz (12 Cores), Motherboard: ASUS P9X79 PRO, Chipset: Intel Xeon E5/Core, Memory: 64512MB, Disk: 240GB INTEL SSDSC2BW24 + 1024GB Samsung SSD 960 PRO 1TB, Graphics: eVGA NVIDIA GeForce GTX 1080 Ti 11264MB, Audio: Intel C600/X79, Monitor: DELL U2711, Network: Intel 82579V Gigabit Connection

	OS: Gentoo/Linux, Kernel: 4.13.4-gentoo (x86_64), Compiler: GCC 5.4.0 + Clang 3.9.1 + LLVM 3.9.1, File-System: ext4, Screen Resolution: 2560x1440

both: 

	Processor: Intel Core i7-3960X @ 5.70GHz (12 Cores), Motherboard: ASUS P9X79 PRO, Chipset: Intel Xeon E5/Core, Memory: 64512MB, Disk: 240GB INTEL SSDSC2BW24 + 1024GB Samsung SSD 960 PRO 1TB, Graphics: eVGA NVIDIA GeForce GTX 1080 Ti 11264MB, Audio: Intel C600/X79, Monitor: DELL U2711, Network: Intel 82579V Gigabit Connection

	OS: Gentoo/Linux, Kernel: 4.13.4-gentoo (x86_64), Compiler: GCC 5.4.0 + Clang 3.9.1 + LLVM 3.9.1, File-System: ext4, Screen Resolution: 2560x1440

387: 

	Processor: Intel Core i7-3960X @ 5.70GHz (12 Cores), Motherboard: ASUS P9X79 PRO, Chipset: Intel Xeon E5/Core, Memory: 64512MB, Disk: 240GB INTEL SSDSC2BW24 + 1024GB Samsung SSD 960 PRO 1TB, Graphics: eVGA NVIDIA GeForce GTX 1080 Ti 11264MB, Audio: Intel C600/X79, Monitor: DELL U2711, Network: Intel 82579V Gigabit Connection

	OS: Gentoo/Linux, Kernel: 4.13.4-gentoo (x86_64), Compiler: GCC 5.4.0 + Clang 3.9.1 + LLVM 3.9.1, File-System: ext4, Screen Resolution: 2560x1440

a: 

	Processor: Intel Core i7-3960X @ 5.70GHz (12 Cores), Motherboard: ASUS P9X79 PRO, Chipset: Intel Xeon E5/Core, Memory: 64512MB, Disk: 240GB INTEL SSDSC2BW24 + 1024GB Samsung SSD 960 PRO 1TB, Graphics: eVGA NVIDIA GeForce GTX 1080 Ti 11264MB, Audio: Intel C600/X79, Monitor: DELL U2711, Network: Intel 82579V Gigabit Connection

	OS: Gentoo/Linux, Kernel: 4.13.4-gentoo (x86_64), Compiler: GCC 5.4.0 + Clang 3.9.1 + LLVM 3.9.1, File-System: ext4, Screen Resolution: 2560x1440


FFmpeg 3.3.3
H.264 HD To NTSC DV
Seconds < Lower Is Better
Intel Core i7-3960X . 5.79 |==================================================
-Ofast .............. 5.81 |==================================================
both ................ 5.84 |===================================================
387 ................. 5.87 |===================================================
a ................... 5.82 |===================================================