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November 27, 2019, 10:06 |
Videocard for Star-CCM+
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#1 |
Senior Member
Chaotic Water
Join Date: Jul 2012
Location: Elgrin Fau
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Hi everyone
Can anyone give some recommendations/feedback on a videocard for Star-CCM? I'm asking this - because i still don't understand which one would provide decent framerate in scene (or 3D-CAD module mode) containing assembly consisting of about a hundred of CAD objects. Currently with my GTX 650 Ti (sounds old, but ...) performance is slow and frustrating - although the same assembly can be viewed and edited without any freezes in SpaceClaim, for example. Another part is rendering (Resampled Volumes, opacity, Advanced Rendering) - is it CPU-based (since there is a "Client Render Threads" setting) or is it GPU-based? If it works through CPU - then is there actually any benifit in having a powerful videocard? Any comment/advice/feedback would be appreciated since I'm pretty confused. |
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November 28, 2019, 01:13 |
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#2 | |
Senior Member
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Quote:
May be this can be a limitation of Star CCM to handled such a large number of CAD objects. In CCM, get into Tools>>Options>>Visualization Select Unmanaged and see if there is any improvement. Unmanaged option let graphics driver allocate GPU for the task based on usage. If you have budget, you can go for better card. |
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November 28, 2019, 16:38 |
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#3 | ||
Senior Member
Chaotic Water
Join Date: Jul 2012
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Quote:
Again - what's then the "Client Render Threads"? - Which can be set to number of cores max, so it points to CPU. Quote:
PS I realize that hardware requirements depend on the complexity of the simulation, so I'm just trying to figure out some kind of milestone/benchmark ... |
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November 28, 2019, 18:26 |
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#4 | |
New Member
ONTARIO
Join Date: Nov 2019
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Quote:
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November 28, 2019, 20:12 |
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#5 | |
Senior Member
Chaotic Water
Join Date: Jul 2012
Location: Elgrin Fau
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Quote:
- Scalar Displayer on Resampled Volume with semi-transparend ColorBar (like "blue-red highpass"); - Geometry Displayer with semi-transparent surfaces; - set Transparency Mode of the Scene to Depth Peeling instead of default value of Alpha-Blending. Because in my case this reduces fps almost to zero on 2 x Xeon E5-2683 v3 with Client Render Threads set to 28 (max cores), so I'm pretty confused about rendering. |
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November 29, 2019, 01:29 |
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#6 |
Senior Member
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Don't get RTX 2080 or GTX 1070 foe CAD workload. The Cuda architecture of Nvdia is not good CAD workload. CAD load favor OpenGL architecture. If you are on tight budget then get AMD RX 580 8GB or Vega 56 or Vega 64 if available. AMD RX 5700 or 5700XT is also good budget choice.
For more budget we can get a Quadro card. Quadro p5000 is very good or you can settle for p4000 as well. you can even get newer RTX quadro cards but I think they are pricey. You can check your graphics performance by, on scene section in simulation, right click and test the graphics. Post the output window here. It should look like "OpenGL supported, direct rendering, OpenGL hardware/Os based rendering detected." Hope you have turned off hyper threading on your CPUs. As you know multiple cores doesn't help in carrying volume rendering. Volume rendering needs single CPU and a GPU. (Check if you are using monitor with cable plugged into graphics card) I too don't have an idea about client render threads. It is set to 12 on my 12 core desktop. I do work with Resampled volume, and it works perfectly on my Quadro m5000. Last edited by ashokac7; November 29, 2019 at 02:37. |
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November 29, 2019, 07:50 |
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#7 | |||||
Senior Member
Chaotic Water
Join Date: Jul 2012
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Quote:
Code:
Quadro P4000 RTX 2080 Ti GPU Memory 8 Gb GDDR5 11 Gb GDDR5 Memory Interface 256 bit 256 bit CUDA Cores 1792 4352 OpenGL Version 4.5 4.6 Quote:
Desktop: Code:
***Water Droplets Track [View = Iso] Report*** OpenGL: supported rendering: direct library: native OpenGL vendor string: NVIDIA Corporation OpenGL renderer string: GeForce GTX 650 Ti/PCIe/SSE2 OpenGL version string: 4.6.0 NVIDIA 391.35 OpenGL extensions: ... pixel format: 8 class: TrueColor buffer size: 32 level: 0 renderType: rgba double buffer: True stereo: False rgba: redSize=8greenSize=8blueSize=8alphaSize=8 depth size: 24 stencil size: 0 aux buffers: 4 accum: redSize=16greenSize=16blueSize=16alphaSize=16 ***End Water Droplets Track [View = Iso] Report*** Code:
***Water Droplets Track [View = Iso] Report*** OpenGL: supported rendering: direct library: native OpenGL vendor string: NVIDIA Corporation OpenGL renderer string: GeForce GT 720/PCIe/SSE2 OpenGL version string: 4.5.0 NVIDIA 385.69 OpenGL extensions: ... pixel format: 8 class: TrueColor buffer size: 32 level: 0 renderType: rgba double buffer: True stereo: False rgba: redSize=8greenSize=8blueSize=8alphaSize=8 depth size: 24 stencil size: 0 aux buffers: 4 accum: redSize=16greenSize=16blueSize=16alphaSize=16 ***End Water Droplets Track [View = Iso] Report*** Code:
***Scene Report*** OpenGL: supported rendering: direct library: native OpenGL vendor string: Intel OpenGL renderer string: Intel(R) HD Graphics 520 OpenGL version string: 4.6.0 - Build 26.20.100.6913 OpenGL extensions: ... pixel format: 5 class: TrueColor buffer size: 32 level: 0 renderType: rgba double buffer: True stereo: False rgba: redSize=8greenSize=8blueSize=8alphaSize=8 depth size: 24 stencil size: 8 aux buffers: 0 accum: redSize=16greenSize=16blueSize=16alphaSize=16 ***End Scene Report*** Quote:
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Unless I just expect too much from hardware - like real-time rendering. |
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December 4, 2019, 00:44 |
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#8 |
Senior Member
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There is a benchmark video on Youtube (By Gamer Nexus) for workstation graphics cards. There are some optimizations done workstation cards which largely influence the CAD performance.
If you are confused then if there is return window period available, buy RTX 2080 Ti, try it in you system, if it works then good or return it. Otherwise it is better to go ahead with Nvdia RTX 5000. Price is more, but you will not miss on workstation GPU optimizations. |
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December 4, 2019, 01:00 |
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#9 |
Senior Member
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I tried Depth peeling instead of alpha blending. There is some stutter. May be because of reduction in FPS.
Again it will depend on mesh size as well I guess. May be you are expecting too much from the hardware. |
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December 4, 2019, 13:07 |
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#10 |
Senior Member
Lucky
Join Date: Apr 2011
Location: Orlando, FL USA
Posts: 5,761
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I would not recommend dumping a lot of $ into a graphics card if displaying a part is the issue you want resolved.
The rendering is slow because you have too many objects to keep track of. A lot of small things will add up. Not saying that better hardware will not help, but it won't be as helpful as you might like. A lot of advances are needed in hardware and libraries for rendering large assemblies. It should say OpenGL: supported and rendering: direct (which it does). That means it is being rendered on the graphics card using OpenGL. |
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December 12, 2019, 00:54 |
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#11 | |||
Senior Member
Chaotic Water
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December 12, 2019, 12:28 |
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#12 |
Senior Member
Lucky
Join Date: Apr 2011
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The state-of-the-art is to render (mostly) on GPU using OpenGL. Rendering 1 part works nicely and you would think that it scales nicely to 10 parts (which it sort of does). But you have to keep in mind that going from 1 to 10 parts is an order of magnitude increase in number of parts and you need to raise this by some exponent for problem complexity (number surfaces, lines, vertexes that need rendering and rays that need to be traced). And 1 to 100 parts is two order of magnitude increase raised by some exponent. Any new graphics card you get, likely won't be 2 orders of magnitude increase in performance. And that basically summarizes the problem.
I've seen time and time again, people with the same frustration sink $ into quad-SLI GFX setups only for the model to still render slowly. A lot of advances in GFX card hardware performance and libraries for rendering a large number of objects are needed before we'll be able to render large CAD assemblies in real time. You might wonder why the better GFX cards over the past decades have not improved CAD rendering and ask how did people render large assemblies before? Well, hardware has gotten better. But a lot of the increased performance has gone into increasing resolution (i.e. from 720p, to 1080p, and soon 4K and after that 8K) and that's where it's all going. If someone wanted to spend some money and get an RTX 2070 or 2080 (or whatever equivalent server-class GFX card you want, or whatever the ATI equivalent is) that's okay in my opinion. These are great cards. But I would not buy four 2080's and expect CAD to be rendered any faster. If you already have an RTX 2080, I'd suggest to stick with it. |
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December 12, 2019, 16:15 |
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#13 | |
Senior Member
Chaotic Water
Join Date: Jul 2012
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Quote:
So I'd just say - that Star's graphical performance is a disaster. |
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December 12, 2019, 16:26 |
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#14 |
Senior Member
Lucky
Join Date: Apr 2011
Location: Orlando, FL USA
Posts: 5,761
Rep Power: 66 |
Solidworks is also super easy to break.I remember when I tried to CAD RL10 rocket nozzle not too long ago...
It rendered nicely without cooling channels. It rendered nicely with 1 cooling channel. It renderered nicely when I patterned the cooling channel 10 times. It completely broke when I changed the circular pattern setting from 10 to 100. This is a single part, not even an assembly. The only difference, was the # of repeats in a circular pattern! |
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