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ATI RADEON X1800 XT 512MB/X1800 XL Performance Preview
October 05, 2005   Brandon Sandman Bell > [View My Other Articles]
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Improved AA quality


Like NVIDIA, ATI provides a new anti-aliasing mode that’s designed to improve the anti-aliasing image quality of thin-lined objects such as chain-link fences and jungle foliage. Dubbed “adaptive anti-aliasing”, ATI uses the same trick NVIDIA does, by combining the image quality of supersampling with the speed of multisampling. We’ve provided a few screenshots taken from Half-Life 2 illustrating the image quality improvement adaptive anti-aliasing brings:

ATI RADEON X1800 XT 512MB/X1800 XL Performance Preview [ ATI 4xMSAA @ 1024 x 768 ] > View Full-Size in another window.
ATI 4xMSAA

ATI RADEON X1800 XT 512MB/X1800 XL Performance Preview [ ATI 4xMSAA second angle @ 1024 x 768 ] > View Full-Size in another window.
ATI 4xMSAA second angle

ATI RADEON X1800 XT 512MB/X1800 XL Performance Preview [ ATI 4xMSAA w/ adaptive AA @ 1024 x 768 ] > View Full-Size in another window.
ATI 4xMSAA w/ adaptive AA

ATI RADEON X1800 XT 512MB/X1800 XL Performance Preview [ ATI 4xMSAA w/ adaptive AA second angle @ 1024 x 768 ] > View Full-Size in another window.
ATI 4xMSAA w/ adaptive AA second angle


You can probably see the difference just scrolling through the screenshots, but we’ve included a crop to really highlight the difference adaptive AA brings:



RADEON X1800 XT 4xMSAA




RADEON X1800 XT 4xMSAA w/Adaptive AA


And now lets see how ATI’s adaptive anti-aliasing compares to NVIDIA’s transparency AA:

ATI RADEON X1800 XT 512MB/X1800 XL Performance Preview [ GeForce 7800 GTX w/Transparency Supersampling AA @ 1024 x 768 ] > View Full-Size in another window.
GeForce 7800 GTX w/Transparency Supersampling AA

ATI RADEON X1800 XT 512MB/X1800 XL Performance Preview [ GeForce 7800 GTX w/Transparency AA Supersampling second angle @ 1024 x 768 ] > View Full-Size in another window.
GeForce 7800 GTX w/Transparency AA Supersampling second angle




GeForce 7800 GTX with 4xTransparency AA Supersampling




RADEON X1800 XT 4xMSAA w/Adaptive AA


Both cards do a really good job of smoothing out the jaggies, although the edges on the RADEON X1800 XT appear a bit softer. The bar that runs across the tree has less jaggies on the GeForce board however.

We also ran a quick performance comparison:





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