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How many GPGPUs do I put if I have a GTX 1080?

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Old   September 14, 2020, 14:52
Default How many GPGPUs do I put if I have a GTX 1080?
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I have an EVGA GTX 1080 FTW edition that has 8 GB of vRAM along with an i7-6700k and 16 GBs of DDR4 memory. How many GPGPUs do I put in the GPGPU selection and how many processes do I put for the CPU Processes?

I'm on Workbench 2019 R3.
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Old   September 15, 2020, 05:42
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i follow this thread since i have a similar issue
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Old   September 15, 2020, 06:42
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For CPU first go to BIOS and turn off hyper-threading then set number of cores to 4 (number of real cores).
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Old   September 21, 2020, 10:56
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Here is my 2 cents:

1.Disable hyperthreading by going into system BIOS.

2.In the FLUENT Launcher,
  • Solver (parallel local machine):Set number of parallel processes to 4 (#physical cores)
  • GPGPUs per machine: 1 - since you have 1 dedicated graphics card

Please note that enabling "GPGPUs per machine" does not necessarily speed up a calculation. It only works for some instances. In some others, such as when using SIMPLE, Fluent turns off GPU assisted acceleration by default since in this case enabling GPU assist will only slow down the computation!
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Last edited by SSG_NJ; September 21, 2020 at 11:15. Reason: additional input
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