openmpi 2 x Intel Xeon X5660 testing with a Dell 0D881F and AMD FirePro V4800 1024MB on Ubuntu 16.04 via the Phoronix Test Suite. openmpi-1: Processor: 2 x Intel Xeon X5660 @ 2.79GHz (24 Cores), Motherboard: Dell 0D881F, Chipset: Intel 5520 I/O + ICH10R, Memory: 40960MB, Disk: 320GB Western Digital WD3200AAJS-2, Graphics: AMD FirePro V4800 1024MB, Audio: Analog Devices AD1984A, Network: Broadcom NetXtreme BCM5761 Gigabit PCIe OS: Ubuntu 16.04, Kernel: 4.10.0-26-generic (x86_64), Compiler: GCC 5.4.0 20160609, File-System: ext4, Screen Resolution: 1024x768 Parboil 2.5 Test: OpenMP LBM Seconds < Lower Is Better openmpi-1 . 506.52 |=========================================================== Parboil 2.5 Test: OpenMP CUTCP Seconds < Lower Is Better openmpi-1 . 8.68 |============================================================= Parboil 2.5 Test: OpenMP Stencil Seconds < Lower Is Better openmpi-1 . 78.03 |============================================================ Parboil 2.5 Test: OpenMP MRI Gridding Seconds < Lower Is Better openmpi-1 . 135.48 |===========================================================