Blender 2.80, Cycles, GPU-Rendering

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Blender 2.80, Cycles, GPU-Rendering

Postby wolgade » Wed Jan 09, 2019 7:32 pm

A few days ago I had my first meeting with Blender 2.80. Apart from all the other big changes Cycles changed a lot as it is now possible to use CPU and GPU at the same time for rendering (https://wiki.blender.org/wiki/Reference/Release_Notes/2.80/Cycles#GPU_rendering), A good rreason to take a small scene and compare render times. These are the rsults:

Code: Select all
CPU: AMD Ryzen 7 1800X, 8 physical cores, 16 threads
GPU: Nvidia GTX 1070
All results in minutes

      | CPU, Tilesize 32x32 | GPU, Tilesize 512x512 | CPU+GPU, Tilesize 32x32 | GPU, Tilesize 32x32
----------------------------------------------------------------------------------------------------
2.79  |        7:32.30      |          5:34.29      |                         | 
----------------------------------------------------------------------------------------------------
2.80  |        5:56.64      |          6:17.17      |          2:58.15        |        4:52.77


A few things are remarkeable.

  • CPU-Rendering got faster with Blender 2.80.
  • GPU-Rendering got faster, but be aware of the next point.
  • Small tile sizes work better than big ones with GPU. In 2.79 it's the opposite.

Of course, combined rendering is the star of this show. Almost twice as fast, without spending any money on additional hardware.

BTW.: Forum software should provide a way to create tables. I never wanted to be an ASCII artist.
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Re: Blender 2.80, Cycles, GPU-Rendering

Postby Aranuvir » Wed Jan 09, 2019 9:10 pm

ASCII art can be beautiful. :D Ever tried:
Code: Select all
telnet towel.blinkenlights.nl

or

Code: Select all
bb


// Sorry, I must admit that's know absolutely of topic...

But thanks for that info anyway. Unfortunately my Radeon 8970m will not be supported by B280. Time to get a new GPU.
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Re: Blender 2.80, Cycles, GPU-Rendering

Postby joepal » Wed Jan 09, 2019 9:40 pm

I gave the CPU+GPU code a try when it was still a patch for 2.79. When rendering an animation overnight, my computer decided it most definitely did not have enough cooling to support two gtx 980 and one 8-core 4ghz i7 running at 100% at the same time for eight hours straight.
Joel Palmius (LinkedIn)
MakeHuman Infrastructure Manager
http://www.palmius.com/joel
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Re: Blender 2.80, Cycles, GPU-Rendering

Postby wolgade » Thu Jan 10, 2019 9:45 am

joepal wrote:my computer decided it most definitely did not have enough cooling to support two gtx 980 and one 8-core 4ghz i7 running at 100% at the same time for eight hours straight.

In winter it should be sufficient to keep all windows and doors of your home wide open while rendering. Especially in Sweden. :lol: :lol:

Seriously, did you have a look inside your computer. You'd be surprised about the heap of dust you'll find even after a short time. Cleaning up this mess often helps.
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