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Intel Core i7-4770 testing with a Gigabyte Z87P-D3 and Gigabyte AMD Radeon R7 260X 1024MB on Fedora 20 via the Phoronix Test Suite.
Gigabyte AMD Radeon R7 260X
Processor: Intel Core i7-4770 @ 3.90GHz (8 Cores), Motherboard: Gigabyte Z87P-D3, Chipset: Intel 4th Gen Core DRAM, Memory: 2 x 8192 MB DDR3-1600MHz, Disk: 1000GB Seagate ST1000DM003-1CH1 + 2 x 120GB KINGSTON SV300S3, Graphics: Gigabyte AMD Radeon R7 260X 1024MB (310.48MHz), Audio: Realtek ALC887-VD, Monitor: VA2231, Network: Realtek RTL8111/8168/8411
OS: Fedora 20, Kernel: 3.13.6-200.fc20.x86_64 (x86_64), Desktop: KDE 4.12.3, Display Server: X Server 1.14.4, Display Driver: radeon 7.2.99, OpenGL: 2.1 Mesa 10.0.4 Gallium 0.4, Compiler: GCC 4.8.2 20131212 + LLVM 3.3, File-System: btrfs, Screen Resolution: 1920x1080
Kernel Notes: radeon.dpm=1
Graphics Notes: GLAMOR
GpuTest
Gigabyte AMD Radeon R7 260X
Processor: Intel Core i7-4770 @ 3.90GHz (8 Cores), Motherboard: Gigabyte Z87P-D3, Chipset: Intel 4th Gen Core DRAM, Memory: 2 x 8192 MB DDR3-1600MHz, Disk: 1000GB Seagate ST1000DM003-1CH1 + 2 x 120GB KINGSTON SV300S3, Graphics: Gigabyte AMD Radeon R7 260X 1024MB (310.48MHz), Audio: Realtek ALC887-VD, Monitor: VA2231, Network: Realtek RTL8111/8168/8411
OS: Fedora 20, Kernel: 3.13.6-200.fc20.x86_64 (x86_64), Desktop: KDE 4.12.3, Display Server: X Server 1.14.4, Display Driver: radeon 7.2.99, OpenGL: 2.1 Mesa 10.0.4 Gallium 0.4, Compiler: GCC 4.8.2 20131212 + LLVM 3.3, File-System: btrfs, Screen Resolution: 1920x1080
Kernel Notes: radeon.dpm=1
Graphics Notes: GLAMOR
Testing initiated at 23 March 2014 11:59 by user root.