A Graphics comparison via the Phoronix Test Suite.
Processor: AMD Athlon 64 X2 6000+ @ 3.10GHz (2 Cores), Motherboard: ASUS M2R32-MVP, Chipset: AMD RD580 + SB600, Memory: 6144MB, Disk: 1000GB Seagate ST1000DX001-1CM1 + 250GB Seagate ST3250410AS, Graphics: Sapphire AMD Radeon HD 7850 1024MB, Audio: Analog Devices AD1988, Monitor: SAMSUNG + PLE2407HDSD, Network: Marvell 88E8001 Gigabit
OS: Ubuntu 14.04, Kernel: 3.13.0-24-generic (x86_64), Desktop: Unity 7.2.0, Display Server: X Server 1.15.1, Display Driver: radeon 7.3.99, OpenGL: 3.1 Mesa 10.3.0-devel (git-9d95d64 trusty-oibaf-ppa) Gallium 0.4, Compiler: GCC 4.8.2, File-System: ext4, Screen Resolution: 1920x1080
Graphics Notes: GLAMOR
Processor: AMD Athlon 64 X2 6000+ @ 3.10GHz (2 Cores), Motherboard: ASUS M2R32-MVP, Chipset: AMD RD580 + SB600, Memory: 6144MB, Disk: 1000GB Seagate ST1000DX001-1CM1 + 250GB Seagate ST3250410AS, Graphics: Sapphire AMD Radeon HD 7800 1024MB, Audio: Analog Devices AD1988, Monitor: SAMSUNG + PLE2407HDSD, Network: Marvell 88E8001 Gigabit
OS: Ubuntu 14.04, Kernel: 3.13.0-24-generic (x86_64), Desktop: Unity 7.2.0, Display Server: X Server 1.15.1, Display Driver: fglrx 13.35.5, OpenGL: 4.3.12798, Compiler: GCC 4.8.2, File-System: ext4, Screen Resolution: 1920x1080
Environment Notes: LIBGL_DRIVERS_PATH=/usr/lib/fglrx/dri:/usr/lib/x86_64-linux-gnu/dri:/usr/lib/dri:/usr/lib32/fglrx/dri:/usr/lib/i386-linux-gnu/dri
OS: Ubuntu 14.04, Kernel: 3.13.0-24-generic (x86_64), Desktop: Unity 7.2.0, Display Server: X Server 1.15.1, Display Driver: fglrx 14.10.2, OpenGL: 4.3.12874, Compiler: GCC 4.8.2, File-System: ext4, Screen Resolution: 1920x1080
Processor: AMD Athlon 64 X2 6000+ @ 3.10GHz (2 Cores), Motherboard: ASUS M2R32-MVP, Chipset: AMD RD580 + SB600, Memory: 6144MB, Disk: 1000GB Seagate ST1000DX001-1CM1 + 250GB Seagate ST3250410AS, Graphics: Sapphire AMD Radeon HD 7850 1024MB, Audio: Analog Devices AD1988, Monitor: SAMSUNG + PLE2407HDSD, Network: Marvell 88E8001 Gigabit
OS: Ubuntu 14.04, Kernel: 3.13.0-24-generic (x86_64), Desktop: Unity 7.2.0, Display Server: X Server 1.15.1, Display Driver: radeon 7.3.99, OpenGL: 3.1 Mesa 10.3.0-devel (git-9d95d64 trusty-oibaf-ppa) Gallium 0.4, Compiler: GCC 4.8.2, File-System: ext4, Screen Resolution: 1920x1080
Graphics Notes: GLAMOR
Testing initiated at 8 May 2014 16:29 by user eugenio.
Processor: AMD Athlon 64 X2 6000+ @ 3.10GHz (2 Cores), Motherboard: ASUS M2R32-MVP, Chipset: AMD RD580 + SB600, Memory: 6144MB, Disk: 1000GB Seagate ST1000DX001-1CM1 + 250GB Seagate ST3250410AS, Graphics: Sapphire AMD Radeon HD 7800 1024MB, Audio: Analog Devices AD1988, Monitor: SAMSUNG + PLE2407HDSD, Network: Marvell 88E8001 Gigabit
OS: Ubuntu 14.04, Kernel: 3.13.0-24-generic (x86_64), Desktop: Unity 7.2.0, Display Server: X Server 1.15.1, Display Driver: fglrx 13.35.5, OpenGL: 4.3.12798, Compiler: GCC 4.8.2, File-System: ext4, Screen Resolution: 1920x1080
Environment Notes: LIBGL_DRIVERS_PATH=/usr/lib/fglrx/dri:/usr/lib/x86_64-linux-gnu/dri:/usr/lib/dri:/usr/lib32/fglrx/dri:/usr/lib/i386-linux-gnu/dri
Testing initiated at 8 May 2014 17:09 by user eugenio.
Processor: AMD Athlon 64 X2 6000+ @ 3.10GHz (2 Cores), Motherboard: ASUS M2R32-MVP, Chipset: AMD RD580 + SB600, Memory: 6144MB, Disk: 1000GB Seagate ST1000DX001-1CM1 + 250GB Seagate ST3250410AS, Graphics: Sapphire AMD Radeon HD 7800 1024MB, Audio: Analog Devices AD1988, Monitor: SAMSUNG + PLE2407HDSD, Network: Marvell 88E8001 Gigabit
OS: Ubuntu 14.04, Kernel: 3.13.0-24-generic (x86_64), Desktop: Unity 7.2.0, Display Server: X Server 1.15.1, Display Driver: fglrx 14.10.2, OpenGL: 4.3.12874, Compiler: GCC 4.8.2, File-System: ext4, Screen Resolution: 1920x1080
Environment Notes: LIBGL_DRIVERS_PATH=/usr/lib/fglrx/dri:/usr/lib/x86_64-linux-gnu/dri:/usr/lib/dri:/usr/lib32/fglrx/dri:/usr/lib/i386-linux-gnu/dri
Testing initiated at 8 May 2014 18:04 by user eugenio.