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ZOTAC GeForce GTX 680 AMP! Edition Graphics Card Review

ZOTAC GeForce GTX 680 AMP! Edition Graphics Card Review

ZOTAC GeForce GTX 680 AMP! Edition Graphics Card Review

FXAA/TXAA and 3D Performance

As we noted earlier in the article with the launch of GTX 680 and the R300 drivers NVIDIA enabled the option to turn on FXAA in the driver control panel. This will force the card to use FXAA in any game that launches. FXAA uses the CUDA cores within our GPU to apply a post processing step (deferred shading) which reduces the aliasing on object edges, otherwise known as "jaggies". Through using FXAA the image receives a quality boost similar to 4xMSAA with less of a performance hit. Quality examples are shown below.

No AA 4x MSAA FXAA

Another new image quality feature is TXAA. TXAA is a mix of hardware multi-sampling, custom high quality AA resolve and an optional temporal component. TXAA1 has a performance hit similar to 2xMSAA with quality above 8xMSAA. TXAA2 drops performance by levels around 4xMSAA while increasing image quality beyond 8xMSAA. Again, here are some examples.

No AA 8x MSAA TXAA

No AA

Benchmark

4x MSAA 4x MSAA FXAA

Of all the results in this article the above image quality comparisons and framerates show the most clear cut win. FXAA offers better IQ than No AA or 4xMSAA and higher framerates than the traditional method by some way. The bonus is that by default turning on Anti-Aliasing in-game actually enables FXAA rather than MSAA.

And here is NVIDIAs official video on TXAA which has been implemented in Black Ops 2, Secret World and Assassins Creed 3…

With those examples in mind, here is how performance is affected in AC3…

Benchmark

Skyrim Dragonborn in 3D
Like previous generations of GeForce product the GTX Titan fully supports stereoscopic 3D for games and movies. To test this technology we ran through Skyrim at 1920×1080 with 16AF, Ultra detail and FXAA enabled.

Benchmark

Skyrim: Dragonborn Settings

NVIDIA recommend a few image quality tweaks to get the best out of Skyrim with 3D Vision and with them enabled the experience is essentially identical to the GTX 680 but faster. No complaints there.

About Author

Stuart Davidson

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