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Felix Rodenjohann avatar image
Felix Rodenjohann asked ·

C4DtoA crashing during rendertime / Threadripper issue?

Hello,


I just wanted to test Arnold on a new Windows machine, to test its capabilities on that machine.

But Arnold is crashing most of the time instantly on rendertime.

I´ve run multiple benchmarks and stresstests and everything worked out fine.

The render finishes when I manually reduce the threads Arnold is allowed to use (to 48). The same, very simple scene (just some cubes and arnold sky), renders fine with Arnold GPU.

Other C4D renderings (physical, standard, redshift) working fine with 100% CPU use.


Is it a threadripper or memory issue?


WINDOWS 64 BIT

AMD Ryzen Threadripper 3970X 32-Core Processor

RAM: 128GB DDR4 Corsai C3200 C16

GPU: 2x Nvidia 2080 Ti

Cinema R20 (Tried it on R21 - same issue)

C4DtoA 3.0.2


best,

Marty


_BugReport.txt



c4dtoa
-bugreport.txt (952.1 KiB)
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Does rendering the same scene from kick work? That would help to tease out whether it's a c4dtoa/c4d issue or possibly a problem with the machine.

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Sry, don`t really know how to do that.

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Felix Rodenjohann avatar image
Felix Rodenjohann answered ·

Ok, it looks like it was a Hardware "bug". The mainboard has an inbuild memory overclocking feature which was on by default. Disabled all "Ai.Tweaking" features and now Arnold runs stable. Arnold was the only software that apparently had a problem with the overclocking - whatever it did. Good to know.

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Stephen Blair avatar image
Stephen Blair answered ·

What memory DIMMs do you have?

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128GB DDR4 Corsai C3200 C16

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Eden Soto avatar image Eden Soto Felix Rodenjohann ·

Are they in XMP mode? Were they on the list of compatible modules for your board?

Also sometimes when you're running a lot of RAM, it may not be stable running at the rated speed (depends a lot on the board and the modules)... I've been able to run 64GB at 3200 on my current board, but my previous board I was using 128GB and had to drop the RAM speed from it's XMP rating of 3200 to 2800 in order to get the machine stable

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Eden Soto avatar image
Eden Soto answered ·

I'm on R21 with a 3990X with all cores/threads active and it's been super stable with rendering (I've let a render go overnight with no problems) so I'd guess it's not because of core/thread count issue with Arnold or a Threadripper issue in general

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