[Bf-cycles] cycles, some questions about GPU

franco cortesi cortesi_8 at hotmail.com
Thu Nov 17 00:11:03 CET 2011


how about using tesla's with cycles?

http://jeffpatton.net/2010/11/gtxquadrotesla-my-opinion-on-todays-gpu-selections-for-rendering/

performance seems to be almost the same compared with high end gaming cards but will cycles work with these teslas? 



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> From: lalli at gmx.net
> Date: Wed, 16 Nov 2011 14:20:21 +0100
> To: bf-cycles at blender.org
> Subject: [Bf-cycles] cycles, some questions about GPU
> 
> Hi Brecht and Followers,
> 
> i'm currently building a new (triple Boot, osx, linux, win) computer, mainly for use with blender/cycles.
> 
> So there's the Thing i'm struggling a bit: The GPU.
> 
> Since those question will probably come up for other blender users as well i would like to ask you once and put a summary on my website (bwide.wordpress.com) for everyone.
> I did a good amount of searching the web for answers, but haven't found.
> 
> So the Questions are:
> 
> Cycles GPU Rendering currently is limited by the amount of available memory on the GPU, as far as i know. 
> 1.-will cycles be able to render scenes bigger than the available Memory on (one) GPU?
> 	1b.-if, in future, cycles uses multiple GPUs will it be still limited by the max amount of memory on one GPU or by the sum of all?
> 
> 2.-Is the rendering speed mainly determined by GFLOPS?
> 	2b.-if not, can you tell me what is?
> 
> 3.-Does Cycles make use of any "newer" NVIDIA technology? I mean will an older GPU (cycles ready) with same specs as a theoretical new One render at about the same speed?
> 
> 4.-Cycles doesn't care about Nvidia SLI, "just" (will) use all GPUs, right?
> 
> 5.-Will cycles care about different GPUs (for example 1xOlder Cuda, 2xNew Cuda)
> 
> 6.-Will/might it be possible to mix Cuda and OpenCL GPUs?
> 
> 7.-Is there a chance that, in future, currently older GPUs like gtx 295 will drop out of Cycles support? 
> 
> 8-. just for private use: Do you recommend any GPU?
> 
> Just wondering:
> 9.-I know you can't tell, but when you think will multiple GPUs be supported (CUDA)?
> 
> 10.-Do you know/predict anything about significant speed differences (of cycles) between CUDA and OpenCL?
> 
> 11.- Between 0-100%, approximate about where is cycles development at the moment.
> 
> 
> That's it for the moment.
> 
> 
> And i'd like to thank you for your amazing work on cycles and blender in general. 
> 
> Have a nice Day.
> 
> bashi
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> Bf-cycles at blender.org
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