16-Way Graphics Card Comparison On Open-Source Linux
Written by Michael Larabel in Graphics Cards on 2 October 2013. Page 2 of 7. 16 Comments

Right off the bat with Doom 3 we see even the old Radeon HD 4000 series graphics cards performing much better than the modern NVIDIA GeForce 500 "Fermi" and GeForce 600 "Kepler" hardware. As explained in the earlier Nouveau comparison article, the open-source NVIDIA driver performance shortcomings largely come down to the driver not yet implementing re-clocking support so that the GPU and vRAM can be properly set to run at their rated frequencies. For pre-Fermi hardware, the re-clocking support in Nouveau right now is hit or miss depending upon the kernel version and other factors. The Intel Haswell HD Graphics 4600 performance was also much better than GeForce GTX 550 Ti and almost up to the GeForce GTX 680 levels due to Nouveau's problems.

The open-source Radeon graphics performance is mostly in line with expectations now that Radeon DPM is in the mainline kernel and overall the R600 Gallium3D driver is in good standing. To reiterate from the earlier 11-way Radeon comparison, the main open-source issues right now is the poor state -- both with OpenGL functionality and performance -- of the RadeonSI Gallium3D driver that supports the HD 7000 series GPUs and newer. Even though the RadeonSI driver isn't nearly as well optimized as the popular R600 Gallium3D driver, the HD 7850 tested at least has no problems outperforming Nouveau on the Fermi and Kepler parts.

A binary driver comparison with AMD Radeon and NVIDIA GeForce graphics cards will come on Ubuntu 13.10 via Phoronix in the coming days.

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