It has been two years since the ATI Radeon HD 4800 (RV770)
series launched so we have gone back since that monumental hardware
launch and have re-tested each Catalyst driver release since then to see
how the performance has changed for the ATI Radeon HD 4850 graphics
card. The Catalyst driver has certainly matured over the course of two
years in speeding up the OpenGL performance with this hardware along
with bringing new features to their proprietary driver, but it is not
exactly smooth sailing.