Phoronix: Low-End NVIDIA/AMD GPU Comparison On Open-Source Drivers

For those looking to purchase a low or mid-range graphics card for use with the open-source graphics drivers -- rather than being bound by NVIDIA's proprietary driver or AMD's Catalyst -- here's a comparison of nine different discrete graphics cards when benchmarked by the open-source drivers.

http://www.phoronix.com/vr.php?view=18520