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Extreme rendering math

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Adam Hoek
Extreme rendering math
on Sep 25, 2016 at 12:42:46 pm

Right now I have;
Processor: Intel(R) Core(TM) i7 CPU 950 @ 3.07GHz
Video Card: AMD Radeon R9 200 Series
RAM: 24 GB

and I have a AE project that takes about an hour to render.
I was wondering if my math below is correct or if I am missing something.

24Gb RAM = 60 minute render
so If I got 1TB of ram my render time would equal:

1000/24=41.6
60/41.6= 1.44 minutes


Is that really possible? I know it would be expensive, but can I expect that kind of performance from AE?
If I ended up getting 2 xeon CPUs would that change anything?


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Tero Ahlfors
Re: Extreme rendering math
on Sep 25, 2016 at 4:24:11 pm

[Adam Hoek] "Is that really possible?"

If, for some reason, you'd get a system that would support that amount of RAM then you'd probably have some absolutely insane hyperthreaded 20+ core processors too. It would be faster, yes.

[Adam Hoek] "I was wondering if my math below is correct"

It really doesn't work that way.


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Adam Hoek
Re: Extreme rendering math
on Sep 25, 2016 at 6:03:46 pm

[Tero Ahlfors] "It really doesn't work that way."

this is my concern. what about it doesn't really work that way?
I feel like im missing something pretty obvious, but cant put my finger on it.


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Tero Ahlfors
Re: Extreme rendering math
on Sep 25, 2016 at 6:55:59 pm

[Adam Hoek] "what about it doesn't really work that way?"

Not all frames have the same render time. You might have some frames that render in a second and then you might have frames that render for 20 seconds. The render will be faster if you can split it to multiple processors (this doesn't work in CC 2015 yet) but there's no formula for counting exact render times for a comp that's running on a certain hardware setup.


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Tero Ahlfors
Re: Extreme rendering math
on Sep 25, 2016 at 7:20:33 pm

Also RAM isn't the only factor in rendering.


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Dave LaRonde
Re: Extreme rendering math
on Sep 25, 2016 at 11:32:14 pm

Tero is, of course, correct. RAM is great, but an effect like noise reduction is EXTREMELY computationally-intensive. Memory plays a far smaller role. Processor speed is far more important. Unfortunately, the newest AE version can't utilize multiprocessing, which uses individual processor cores to render frames. You have to render in AE CC 2014 to take advantage of multiprocessing. You can open AE CC 2015 in AE CC 2014.

Dave LaRonde
Promotion Producer
KGAN (CBS) & KFXA (Fox) Cedar Rapids, IA


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Adam Hoek
Re: Extreme rendering math
on Sep 26, 2016 at 6:41:21 am

AE CC2014 is still my preference anyway. I cant get used to how cc2015 ram preview works.
Thanks for the info though everybody. Looks like I've got some new math/research to get into.


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