What processor to buy for Fusion rendering?.

[fprico]

Hi, 

I am between two proecessors the 9900k and the 3900x. I know that the 3900x have 12 cores vs 8, but I don't know how it works in fusion 360 as I don't have any benchmark. Will the 3900x be a lot faster in Fusion rendering?. 

[Beyondforce]

Since speed is the most important factor, you can make your own prediction. You can do that at https://tesreg.com/

[fprico]

Sorry I am not the owner of the 3900x, this was a request to a youtube user.

Is it posible anyone could make a video of same scene to see the rendering speed compare to intel processors?

Have you had the opportunity to test the 3900x vs the 9900k yet in rendering ?

[Beyondforce]

Unfortunately, no one tested the 9900k yet. But there are 2 who tested the 3900x. You can see that the results are the same because the speed wasn't the same (maybe one was overclocked).

The 9900k top speed (without OC) is 5.00 GHz with good cooling. If you sort the CPU speed column, you will see the i7-7700K with 5.00 GHz (during the test) Render test is - 00:01:03. You can assume from that, that the 9900k will be +/- the same. Now you need to compare the cost of those 2 CPUs.

[fprico]

So it seems that for fusion 360 render core speed determine the rendering speed. I thought fusion render works like others render engine that benefits from multicore.

[Beyondforce]

You are correct. Unfortunately, right now the CPU is the only option. Maybe one day in the future that would change. It always good to have more options 😉

[fprico]

but it uses all cores to render I could see it in the task manager, may be it have a core count limit.

[Beyondforce]

When you render it takes everything (that's how it should be). In some situations/features/commands it uses all cores and in some only one core/CPU.
That will also change as soon as Fusion 360 will support multi-threading. But it's not gonna happen any time soon!

[fprico]

Talking about rendering speed, it looks that Fusion don t benefit to much from the extra cores I could see 3900x and 3600x that they have same rendering results on the table.

[Beyondforce]

Yep, speed is the main factor in F360!
Extra cores help in running more programs at the same time.

[fprico]

Here is a more complex scene to test, this take me a lot of time to render:

https://www.youtube.com/watch?v=SlkmlgVPPts&feature=youtu.be

what is your processor? could you test with this also?.

[Beyondforce]

Interesting project, I like it!
The test file I have chose to the benchmark table, I have chose it very carefully. The test file is not too complex and not too simple.

Send me the file and I'll test it. My CPU is 8700K

[TrippyLighting]

@fprico are interior renders are what you are mostly looking at rendering?

[fprico]

Hi,
interior renders its not what I do mostly, but in some situations I may have to do it. Also interiors are heavier to render and takes more time, so its good to see render times when things get heavier. An other option would be to render a large assembly. Also I may showcase a product in an interior like a desk or other products.

[fprico]

I just buy a pc with 3960x 24 core I will recibe it in a month or so. 

I really doubt Fusion 360 render don't benefits from the extra cores, then how you explain cloud render is that fast. I don't think the servers have high speed processors it may have lots of cores.

[Beyondforce]

More cores won't help you in regards to rendering. The software is not designed to efficiently use all cores as fx. adobe photoshop does. You need speed!!!
A cloud server CPU is not a home computer CPU, you can google it if you want to know more about it.
More cores mean you can more programs simultaneously.

[TrippyLighting]

---

@Beyondforce wrote:
More cores won't help you in regards to rendering. The software is not designed to efficiently use all cores as fx. adobe photoshop does. You need speed!!!

---

Can you provide some data so substantiate those claims?

[Beyondforce]

This article explains in a good way why:
https://winnervps.com/index.php/knowledgebase/198/CPUs-Core-Count-vs-Clock-Speed-Which-Is-Better.htm...
The bottom line is it's about the balance between the number of cores, speed, and CPU cooling. Don't forget that the OS is also playing a big role in how many cores (and speed) an application can take!
Since Fusion 360 doesn't support multi-threading, increasing the amount of cores in your CPU won't be a cost effective way to increase performance.
In the TESREG Benchmark Table you can see on average the higher clock speed the faster is the rendering.

[Joshua-Braun_ZM]

Hey,

I've got an I9 9900K i ran your rendering @Beyondforce but i could'nt find the processor on your website so i just going to post the results here:

This are my specs while running: (it has 64GB RAM)

My Home Pc uses a 2700X so i did a rendering too for comparison:

And here are the specs: (It has 16GB RAM)

It is not that much slower but has less Mhz and is way cheaper.

Would be interesting how a 12 or 16 core or even more cores would perform against these two.

[Beyondforce]

Great work @Joshua-Braun_ZM,
Do you want me to add the results to the table?

[Joshua-Braun_ZM]

Thank you.

If you add the processors to your table-data i can add the results by myself.

I really like your work on the table because when I build my Workstation I did not know if it is going to work with Fusion 360 as expected.

But maybe it would be better if there was some sort of software which reads out what kind of hardware the pc is using and how much MHz they have while the "benchmark" is running.

This would make your table more reliable.

I really like the "userbenchmark" : https://www.userbenchmark.com/

maybe something like that.