FSAA & Anisotropic Filtering Performance

Here we'll take a look at the FSAA and Anisotropic filtering performance across the range of FSAA options available with the X800 boards. In this instance we're using our SS:SE demo.

 

 

X800 XT PE - SS:SE No AA 2X AA 4X 6X
1X AF (None) 113.2 107.1 98.7 94.0
8X AF 100.0 93.7 86.2 81.6
16X AF 96.9 89.1 83.3 77.2
 
% Diff from 1X AF No AA 2X AA 4X 6X
8X AF -11.7% -12.5% -12.7% -13.2%
16X AF -14.4% -16.8% -15.6% -17.9%
 
% Diff from 1X FSAA 2X AA 4X 6X
1X AF (None) -5.4% -12.8% -17.0%
8X AF -6.3% -13.8% -18.4%
16X AF -8.0% -14.0% -20.3%

With this demo we see that the performance of the X800 XT PE never falls below an average of 77 FPS.

 

X800 XT PRO - SS:SE No AA 2X AA 4X 6X
1X AF (None) 100.3 86.5 82.1 73.5
8X AF 88.3 73.4 69.1 63.3
16X AF 83.7 70.0 67.4 60.1
 
% Diff from 1X AF No AA 2X AA 4X 6X
8X AF -12.0% -15.1% -15.8% -13.9%
16X AF -16.6% -19.1% -17.9% -18.2%
 
% Diff from 1X FSAA 2X AA 4X 6X
1X AF (None) -13.8% -5.1% -10.5%
8X AF -26.8% -20.1% -22.9%
16X AF -30.2% -22.1% -26.8%

Obviously the X800 PRO has a lower performance than the X800 XT PE, but still the average performance even with 6X FSAA and 16X AF remains just over 60 FPS. Due to the slightly lower fill-rate of the PRO in comparison to the X800 XT PE the performance hits for enabling Anisotropic Filtering is slightly greater.