[Bf-cycles] still memory problem with cuLaunch on GTX780Ti 3GB with empty scene

Thomas Dinges blender at dingto.org
Tue Sep 15 20:56:23 CEST 2015

This is pretty much a known issue, since day 1 of the experimental 
kernel. We added the experimental kernel for features such as SSS, which 
are the cause of the memory peak (or rather SSS enabled as part of our 
mega kernel).
The only real solution here will be the CUDA split kernel. That split 
might still happen later this year, it's on our todo list.

Until then, as Brecht said, use it at your own risk.

Am 15.09.2015 um 19:54 schrieb Piotr Arlukowicz:
> Thank you Brecht, I understand this and that's OK with memory, but... 
> still 1.5GB is not enough even for empty scene... ? Come on! :)
> I was so desperate that I started to look which GTX should I buy. 
> Surely 980Ti with 6GiB is a great graphics card, but WILL it work?
> Few months ago Cycles worked in experimental mode just very well and 
> as I don't require it to be bulletproof, this memory lag just kicks me 
> out :( Sorry for sharing personal mood on the list. I hope somebody 
> can advice what to do. Because I don't know if 6GB will be enough, and 
> then there is also Titan with 12GB...
> regards
> pio
> ​Piotr
> ​ Arlukowicz, BFCT​
> ​**YT:*_/user/piotao?feature=guide_*
> *FB:*_/polskikursblendera_ *TW:* _/piotao
> _
> *Blender Network:* *https://www.blendernetwork.org/piotr-arlukowicz*
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> 2015-09-15 18:08 GMT+02:00 Brecht Van Lommel 
> <brechtvanlommel at pandora.be <mailto:brechtvanlommel at pandora.be>>:
>     Experimental mode uses significantly more memory. I don't know if this
>     is more than expected at the moment, but it wouldn't surprise me.
>     This memory usage is one of the main reasons it's called experimental
>     mode, if all the features there worked well they would not be called
>     experimental. I know a lot of users enable this but it's really at
>     your own risk.
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