How Nouveau Compares To NVIDIA's Linux Driver When Kepler Re-Clocking Works
Written by Michael Larabel in Display Drivers on 27 November 2015. Page 3 of 3. 23 Comments

The Xonotic results show that even with the fully re-clocked GeForce GTX 680 on the open-source Nouveau driver, there's still much greater performance out of NVIDIA's proprietary Linux graphics driver on Ubuntu.

Today's results show that the Kepler re-clocking allows for much greater performance against the NVIDIA driver -- when the re-clocking works -- but there's still more needed in the way of performance optimizations to make this open-source driver more competitive against NVIDIA's offerings. It's also important to keep in mind that the Kepler re-clocking is still a work-in-progress, the support isn't enabled by default (you need to pass a kernel command-line parameter and then manually configure the pstate via sysfs/debugfs), and that there isn't yet support for dynamic re-clocking to adjust the clock frequencies based upon load.

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Michael Larabel is the principal author of and founded the site in 2004 with a focus on enriching the Linux hardware experience. Michael has written more than 20,000 articles covering the state of Linux hardware support, Linux performance, graphics drivers, and other topics. Michael is also the lead developer of the Phoronix Test Suite, Phoromatic, and automated benchmarking software. He can be followed via Twitter or contacted via

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