AMD Ryzen & Use Embree (V-Ray)

15 Apr, 2017 Mark EVision
15 Apr, 2017 # Re: AMD Ryzen & Use Embree (V-Ray)

Gentelman 3d maniac, It's time to revive the topic about best CPU for rendering.

It is 2017 and a new favorite comes on the scene - AMD ryzen 7 1800x

I read about this processor all day, looked at benchmarks and tests and I believe! 😁 It looks like this is really the best of the available CPUs for rendering for affordable price! (According to many benchmarks this CPU breathes down the X series' neck, which is 3-4 times more expensive)
---

But I would like to hear the opinion of colleagues, what do you think, friends? Who has experience in working with the new 8-core giant? Should I take it for my main computer? Should I take it for render-nodes?
It seems the balance of forces has changed a lot in favor of AMD, I can't hide my exitement!


18 Apr, 2017 Maks (Staff Author)
18 Apr, 2017 # Re: AMD Ryzen & Use Embree (V-Ray)

Hi Mark,

The new Ryzens, as we can see from the lot of trusted benchmarks, have very good total processing power while having low electircity consumption and low price.

But, as it is with all latest AMDs, that is achieved by a mututal work of lot of cores, meaning not the best single-thread performance that is vital for actual work. So Ryzen is not the best thing for the workstation.

As for the multi-threaded (=regular) rendering, it is not a problem at all. This is a great CPU for a general render-node.

Discussing V-Ray in particular, I cannot advice Ryzen because of lack of info by today. All because the mystic Embree support by Intels, while AMD can't use it. In theory, Ryzen SHOULD support it. But, unfortunately, I'm not aware of that and all trusted benchmark sources do not specify if they "Use Embree" in test V-Ray scenes.

Does anyone has Ryzen to clarify that?


24 Apr, 2017 Dreamer
24 Apr, 2017 # Re: AMD Ryzen & Use Embree (V-Ray)

I have a Ryzen 1800x, I can try to render a test scene.


18 Apr, 2017 Maks (Staff Author)
24 Apr, 2017 # Re: AMD Ryzen & Use Embree (V-Ray)

Hello Dreamer,

 

That's great! Please take this test scene

appartement_vray_tutstart_1.rar

from https://docs.chaosgroup.com by Wouter Wynen from Aversis (http://www.aversis.be/) without textures, open it, just set resolution to 800x650 and render it. Then, put a checkmark on Use Embree in Render Setup > Settings > System and render again. We'll compare both times, if the second option goes through at all.

 

My Intel Core i7-5775C at baseclock with 16GBs RAM did:

  • Embree off: 01:56 or 116 seconds, let it be 100%;
  • Use Embree: 01:26 or 86 seconds, that is 74%.

Same Intel Core i7-5775C at @4.1GHz:

  • Embree off: 01:42 or 102 seconds, let it be 100%;
  • Use Embree: 01:19 or 79 seconds, that is 77%.

 Similar relative values are on i7-3770 and i7-6700K: 79% and 75%.

3ds Max 2015 + V-Ray 3.00.07


25 Apr, 2017 sur-pur
25 Apr, 2017 # Re: AMD Ryzen & Use Embree (V-Ray)

Hi,

Ryzen supports embree. I've checked on the test scene above

Ryzen 1700 3.7GHz:

  • Without Embree: 00:55
  • Use Embree: 00:22

24 Apr, 2017 Dreamer
26 Apr, 2017 # Re: AMD Ryzen & Use Embree (V-Ray)

Results of Ryzen 1800X, RAM 32GB (stock cpu/ram settings, no overclocking):

  • Without Embry: 19.7 seconds
  • With Embry: 7.9 seconds

 

Results by Core-i7 3770K RAM 16GB (stock cpu/ram settings, no overclocking):

  • Without Embry: 38.3 seconds
  • With Embry: 22.7 seconds

 

3dMax 2017 sp3 + v-ray 3.40.01 on the Ryzen and 3.40.03 on Intel


18 Apr, 2017 Maks (Staff Author)
26 Apr, 2017 # Re: AMD Ryzen & Use Embree (V-Ray)

Very good results! Sur-pur, Dreamer could you give screenshots of render settings? And you can see, my vray finished apparently same scene for a much longer time. We need to decide to announce the winners 😁


24 Apr, 2017 Dreamer
27 Apr, 2017 # Re: AMD Ryzen & Use Embree (V-Ray)
So the render settings are pinned from the same file. Or am I wrong?


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