Phoronix is looking at the differences between the X.Org open-source ATI Radeon driver and that of ATI's proprietary fglrx display driver.

Since Stephen Shankland's article at CNET entitled New Linux look fuels old debate, we have been overwhelmed with requests to take a serious look at the frame-rate performance differences between the various open-source and proprietary contenders. Our first article on this topic, which will likely be the first of a series of examinations, is looking at the differences between the X.Org open-source ATI Radeon driver and that of ATI's official but proprietary fglrx display driver. Will open-source breathe new life into old GPU products?

ATI: Open v. Closed Drivers