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matt cawte (mattcawte)
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May 11 2016, 3:38 PM (178 w, 6 d)

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May 23 2016

matt cawte (mattcawte) added a comment to T45093: Cycles: NVidia GTX 980 Ti rendering at 1/3rd speed of NVidia GTX 980 the same machine?.

That's good news, thanks very much for referring the problem to them.

May 23 2016, 12:15 PM · BF Blender

May 17 2016

matt cawte (mattcawte) added a comment to T45093: Cycles: NVidia GTX 980 Ti rendering at 1/3rd speed of NVidia GTX 980 the same machine?.

The problem is the same with the latest driver.

May 17 2016, 9:44 PM · BF Blender

May 16 2016

matt cawte (mattcawte) added a comment to T45093: Cycles: NVidia GTX 980 Ti rendering at 1/3rd speed of NVidia GTX 980 the same machine?.

Did anyone test the TDR related settings and their impact on this ?
https://msdn.microsoft.com/en-us/library/windows/hardware/ff569918%28v=vs.85%29.aspx
I would increase all timeouts by a factor of 10 at least and maybe just try to disable tdr all together by setting level to 0.

May 16 2016, 10:37 PM · BF Blender

May 11 2016

matt cawte (mattcawte) added a comment to T45093: Cycles: NVidia GTX 980 Ti rendering at 1/3rd speed of NVidia GTX 980 the same machine?.

The tile size graphs you created are true for my TitanX on Windows 10 also, it prefers relatively small tiles. I also have an old Titan 6Gb in the same machine which renders much faster than the TitanX. Particles, smoke, SSS and real-time viewport rendering (not tiled) take the biggest hit on the TitanX, where it grinds to a painfully slow speed compared with the old Titan.

May 11 2016, 4:01 PM · BF Blender