Phoronix published a review on the Linux Benchmarks Of NVIDIA's Early 2015 GeForce Line-Up
A quote from the article:
Following yesterday's NVIDIA GeForce GTX 960 launch, here's an 11-way comparison looking at all of NVIDIA's Maxwell GPUs as well as many Kepler and Fermi GeForce graphics cards under Linux. Beyond the raw OpenGL performance, the thermal and power efficiency data is also available for the tested range of GeForce 900/700/600/500/400 series graphics cards.Linux Benchmarks Of NVIDIA's Early 2015 GeForce Line-Up @ Phoronix
In yesterday morning's launch article for the GTX 960 there were some Linux benchmark results but it was limited by the time available with having this $200 Maxwell graphics card just a few days before launch and also running into various Catalyst 14.12 Linux driver issues. Running the AMD Radeon graphics card tests on Linux are messy with the Catalyst 14.12 Omega driver having big issues in running tests like Unreal Engine 4 and Metro Redux under Linux.