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New 3080 PC Build Performance vs 2014 iMac.


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I'm trying to avoid a 'why's my C4D so slow' post here, but also very much one of those posts.

 

I've installed R23 on a brand new PC build - 64GB RAM, RTX 3080, AMD 3960X - and definitely not seeing the render times I expected.

 

I'm working on a project on 2 different machines, the new PC and a 2014 iMac 5K 27". I'm seeing much better performance on the iMac than the PC.

iMac - 32GB RAM, i7 Quad, AMD Radeon R9.

 

The scene contains a ToonRig character, a low-poly bike, and a low-poly scene built mostly from instances. For general viewport navigation I have to disable pretty much everything and work in Box mode with quality set to Low, even just to move around the scene. Barely even started animating the character yet. Character is 10K polys. Whole scene is 21K polys.

 

Speed Tests:

 

Hardware / Viewport Render (only character enabled):

PC: 10s

iMac: 1s

 

Standard Render:

PC: 3m

iMac: 7s

 

Hardware / Viewport Render (full scene):

PC: 11-25s

iMac: 0-5s

These exports go up to their slowest times then all drop to the quickest after around 50 frames (what's the reason for this too?)

 

 

I guess firstly, is there anything obvious I may have missed during set-up after moving over to PC? Can't be anything that different between PC & Mac set-ups to unlock the extra power??

 

Secondly, what would be slowing such a simple scene down? Surely it's the character rig, but it's a fairly basic character so I'm unsure how best to work with it, other than in Low and Isoparms Mode.

 

Thirdly, Is there any kind of scene test file to ensure everything is running as it should on the new build, speed and compatibility wise?

 

Any advice appreciated.

 

Scene file available here - https://we.tl/t-USSU5ZVoED

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You're introducing too many variables. If you're working directly from a cloud drive, you have no idea what the OS is doing behind the scenes. Perhaps the mac version of the software is caching files

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11 minutes ago, Cerbera said:

Is there a reason you are not using render instances for most of your instances ?

 

CBR

I was trying to where possible, but I planned on using the road parts along a Spline Wrap in the final scenes. From the tests I did, the render instances weren't working when placed inside a Spline Wrap. 

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You may want to run a few bench marks to see if your system is running optimally.  Make sure your windows is up to date, all drivers are latest, no background tasks are running that shouldn't be from the task manager. Check temps for motherboard, and CPU. I assume you have fast ram as AMD Ryzen needs it for best performance so 3200mhz seems to be where many go to.

 

Cinebench r23

Userbench

PC Mark

3D Mark

Crystal Disk

 

Dan

 ArtStation    Website 

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looks like there is a mayor issue with your pc build. on my pc notebook i get round about the same render times as you on your mac. so it doesn't look like a general mac vs. PC issue.

 

best regards

Jops

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Is this a machine you built yourself or something prebuilt?

 

Install cinebench and tell us the scores it gets after the main test

Install ryzen master and let us know what cpu temperature you get whilst idle doing nothing and mid-render

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Thanks for the advice, I'll try all of this tomorrow in the office. I'll be back with some results.

 

The PC was built by PCSpecialist. Just checked and the RAM is Vengeance 2400MHz... not ideal then.

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Cinebench results attached. Ryzen Master results coming.

 

I just noticed if I let the viewport render keep running, after 50 frames it drops to 1s a frame, then starts rising again after a few hundred frames.

Cinebench 2.png

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In Cinebench please use the advanced setting and choose min test duration of 10 or better 30 min. This will stress test your cooling etc. The 3960x is so fast that many parts do not reach critical state until the default benchmark is over.

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5 hours ago, srek said:

In Cinebench please use the advanced setting and choose min test duration of 10 or better 30 min. This will stress test your cooling etc. The 3960x is so fast that many parts do not reach critical state until the default benchmark is over.

 

Thanks Srek, here's the results. Any other results I should be exporting or is this enough?

Cinebench 3.PNG

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