Phoronix: Nouveau Driver Remains Much Slower Than NVIDIA's Official Driver

While benchmarks this week have shown the Nouveau driver can be faster with the Linux 3.8 kernel, further benchmarks have shown that this reverse-engineered open-source driver for supporting the spectrum of NVIDIA GPUs is still at a significant loss compared to NVIDIA's official but proprietary Linux graphics driver.

http://www.phoronix.com/vr.php?view=18344