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Early Radeon vs. Nouveau OpenGL Tests On Linux 4.4
The Linux 4.4 Kepler GDDR5 re-clocking fixes seem to allow the GTX 680 to fully re-clock well. However, the GTX 680 Nouveau results do indicate that the GTX 780 Ti re-clocking at the 0f performance state still isn't fully working. The GTX 680 performance was now more competitive with the Radeon R9 290 than at any point in the past with the Nouveau driver. The other cards still show more re-clocking work is needed.
With Tesseract, the GeForce GTX 680 is faster than the Radeon R9 290.
When running the Unigine Valley test, the Nouveau GeForce GTX 680 results were quite competitive with the Radeon R9 290. It will be interesting to compare the GTX 680 Nouveau vs. NVIDIA Linux driver performance.