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Old 19th October 2016, 17:47   #39772  |  Link
Asmodian
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Join Date: Feb 2002
Location: San Jose, California
Posts: 4,406
Quote:
Originally Posted by Shiandow View Post
Keep in mind that FLOPS can only do so much to make things faster; running shaders always has some overhead (reading / writing memory etc.) and for modern GPUs this overhead seems to dominate the computation time for all but the most computation intensive shaders (e.g. NNEDI3).

Case in point, a while back I upgraded my GTX 560Ti to a GTX 960, and while the GTX 960 is definitely faster the difference in FLOPS is far greater than the difference in render times.
I have noticed this too. All the easy shader passes take 0.49ms on my Titan X and this is independent of clock speed and resolution. This means an easy six pass shader, like thin edges, is the same 3 ms on my Titan X as it was on my 980Ti while NNEDI3 256 is much faster on my Titan X.

More FLOPS = Faster in madVR, it isn't 1 to 1 but other aspects don't do much to help madVR at all.
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