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GaryAbrehart

Cinebench Single CPU Scores

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OK I have an ageing i7 980 CPU which is still fine for a lot of the work I do. It is complimented by dual nVidia 980ti GPUs working with redshift for GPU rendering and another HP dual Xeon cpu machine for normal rendering. But I was planning on getting a new motherboard and one of those there Threadripper  1950X which runs at 3.4 ghz. Now I though if I am going down the GPU route then I wouldn't need such an expensive CPU and since alot of the work I do is animation/modelling a machine with a faster clock speed would be a better choice and possibly cheaper.

 

So I ran Cinebench and got a single core score of 104 for my i7 machine and 101 for my HP machine. So since a lot of processing in C4D is still single core any speed improvement would be a greater benefit to me. I think that I saw a Threadripper 195X0 score 154 in the CPU departement so that would be a 50% speed increase which is nice but anything faster would be nicer. The area that the faster CPU would benefit me would be in previews for character animation work. If the CPU were faster I wouldn't have to keep making previews which are quite time consuming.

 

Anyone got any suggestions?

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6 hours ago, GaryAbrehart said:

Preview renders for instance?

Yes, if you have more cores it will render faster - if you use standard or physical. OpenGL preview is done on GPU.

Make sure you get sufficient ram , proper PSU and good cooling. Most important thing is that your system is stable....


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  • Thanks for the tips guys! Here is the info that I read that started me off on this path and it was suggesting an Intel i7 8700K chips since it runs at 3.7 ghz. There is a newer one i7 8086K which is slightly faster 4.0ghz...

     

    CG Director

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    If youre gpu rendering, I would skip threadripper. It is a great cpu but its power will go untapped unless you cpu render, plus it isn't the fastest single thread chip. An intel 8700k or 8086k would be quite a bit faster, clocking in over 200 CB for single threaded tasks. These chips will hit 4.7 and 5ghz without overclocking.


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  • Well I looked at the 8700 and the 8086 chips for that very reason but also noted that they are not ideal for GPU rendering since they are only 16 lane whereas the threadrippers are all 64 lane which would give better GPU performance.

     

    The i7 8700K/8086K have 16 PCIE-Lanes, meaning you could use only one GPU at full speed with these type of CPUs. If you want more than one GPU at full speed you would need a different CPU that supports more PCIE-Lanes like the AMD Threadripper CPUs, that have 64 PCIE-Lanes, the i9 7800X (28 PCIE-Lanes) or the i9 7900X Series CPUs that support 44 PCIE-Lanes.

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    If you plan to use 2 GPUs, go to 7820X, 8 core / 16 threads, 4.5 GHz boost, or 7900X if you plan to use 3 or more GPUs. Threadripper is good also, but has lower IPC, and 16 cores / 32 threads are not needed if rendering is done with GPU(s). 8700(K) and 8086(K) has highest IPC speed, but limited to just 16 pci-e lanes which is not good if you want to use more then 1 GPU for rendering.

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    Does running GPU renderers such as Redshift with cards in PCIEx8 configuration bottleneck performance? Many miners tend to run their GPUs in x1. Not all applications saturate the PCI bus. 

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    Running cards in x8 instead x16 gives almost same performance overall, very small difference, around few %, probably depends of how "heavy" scene is for rendering. For full potential x16 is desirable.

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  • OK aside from cpu and gpu rendering performance what would be the best cpu for animation ie fps performance?

     

    Looking at the cinebench results the threadrippers seem to get 90-100 fps which is what I already get on my old banger... So I am assuming I would still be better off with an Intel chip with a higher clock speed?

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