Ubuntu is a Debian-based Linux operating system, with Unity as its default desktop environment. It is based on free software and named after the Southern African philosophy of ubuntu (literally, "human-ness"), which often is translated as "humanity towards others" or "the belief in a universal bond of sharing that connects all humanity". According to some metrics, Ubuntu is the most popular Linux distribution.
Now having compared the graphics driver performance between Microsoft Windows 7 and Ubuntu 12.04 Linux for the NVIDIA driver with the GeForce GTX 680 and the multi-platform Intel performance for Sandy Bridge and Ivy Bridge, here’s a look at the AMD Catalyst driver performance with the Radeon HD 7950 graphics card when running between Windows 7 and Ubuntu Linux. Read more here