crossfire ok dans catalyst
AMD FX-6300 Six-Core testing with a ASRock 970 Extreme4 and Sapphire AMD Radeon HD 7900 3072MB on Ubuntu 14.04 via the Phoronix Test Suite.


uniginecrossfire: 

	Processor: AMD FX-6300 Six-Core @ 3.50GHz (6 Cores), Motherboard: ASRock 970 Extreme4, Chipset: AMD RD890 bridge, Memory: 8192MB, Disk: 640GB Western Digital WD6400AAKS-2 + 120GB KINGSTON SV300S3, Graphics: Sapphire AMD Radeon HD 7900 3072MB, Audio: AMD SBx00 Azalia, Monitor: LG TV + LG TV, Network: Realtek RTL8111/8168/8411

	OS: Ubuntu 14.04, Kernel: 3.16.0-38-generic (x86_64), Desktop: Unity 7.2.5, Display Server: X Server 1.16.0, Display Driver: fglrx 15.20.2, OpenGL: 4.4.13374, Compiler: GCC 4.8, File-System: ext4, Screen Resolution: 1360x768


Unigine Valley 1.0
Resolution: 1920 x 1080 - Mode: Windowed
Frames Per Second > Higher Is Better
uniginecrossfire . 37.93 |=====================================================


Unigine Valley 1.0
Resolution: 1920 x 1080 - Mode: Fullscreen
Frames Per Second > Higher Is Better
uniginecrossfire . 23.38 |=====================================================