Performance in Simulators
Colin McRae Rally 2005
In Colin Mc Rae Rally05 the texturing workload is not very high either. So the major factor influencing the graphics cards performance here is the number of pixel processors and their working frequency. Of course, the number of texturing units also tells on the scores. RADEON X1600 XT has only 4 texturing units like that against 12 by GeForce 6800, but its high GPU frequency makes up for the lack of TMUs that is why it goes almost neck and neck with the NVIDIA solution in all resolutions except 1600x1200. Here the ATI RADEON X1600 XT yields its positions to competitor. Unlike Splinter Cell: Chaos Theory the highest minimum framerate here belongs to GeForce 6800.
When we enable FSAA, RADEON X1600 secures its positions and even outperforms GeForce 6800 GT in 1280x1024 a little bit. In 1600x1200, however, it steps back to the level of GeForce 6800 due to the influence of the memory subsystem. Even though the memory bus of RADEON X1600 XT is half as wide as the memory bus of GeForce 6800, its practical bandwidth is almost the same: 22.08GB/s against 22.4GB/s.