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MultiGPU-antialiasing

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boxleitnerb

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AMD has Crossfire 16x SGSSAA that works on the same frame at the same time afaik. So one card provides 8 samples, the other one the other 8. This should completely eliminate microstuttering as it's not AFR anymore. However, this particular AA-mode seems to be very slow and doesn't provide that much of a image quality bonus compared to 8xSGSSAA.

I was wondering if it was possible to enable CF/SLI-SGSSAA with fewer samples like 4x or 8x (2 or 4 samples per card respectively) and what scaling efficiency could be achieved. Lastly: Why is it not implemented?

Don't get me started on SLI-AA - bad sample positions, only applies to polygon edges...no thank you.
 
I would guess that the reason it's not implemented on AMD's side is because they haven't enabled it in the drivers yet.

I personally think that 4x RGSS is perfect in any application as long as the texture LOD bias isn't adjusted so that shimmering is introduced.

Anyway, I agree that 16x SGSSAA is overkill. They only AA settings should really be 2/4x RGSSAA and 8x SGSSAA. I've never understood why programmable sample patterns are necessary.
 
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