ATI Catalyst 5.11, 5.12, 5.13 Beta and Radeon Omega Drivers 2.6.87 performance comprasion. ATI updates its drivers software monthly. This tradition was set up after the first version of Catalyst software was out. But besides that, index version is chosen with the accordance to one specific rule. The first part of it symbolizes the year when the software was out and the second is the month when the driver was released. We should mention that changes in every new version of ATI graphics drivers are not very fundamental. Usually only some bugs are corrected and the performance is improved a little in some popular tests and games. But when the new generation of GPUs is released the company programmers very often need to optimize the driver code for some time. So the new drivers version sometimes can include considerable improvements, but in most cases they concern only the last generation of graphical processors.