{"id":292724,"date":"2023-07-12T10:02:05","date_gmt":"2023-07-12T10:02:05","guid":{"rendered":"\/forum\/forums\/topic\/problem-with-ansys-fluent-gpu-accelaration\/"},"modified":"2023-07-12T10:02:05","modified_gmt":"2023-07-12T10:02:05","slug":"problem-with-ansys-fluent-gpu-accelaration","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/problem-with-ansys-fluent-gpu-accelaration\/","title":{"rendered":"Problem with Ansys Fluent GPU accelaration"},"content":{"rendered":"<p>Question: Ansys Fluent on RTX 3090 Ti and on Quadro RTX A4000 is not working<\/p>\n<p>I am using Ansys Fluent (Research Licence) with the NVIDIA GeForce RTX 3090 Ti, 24GB (Zotac AMP Extreme Holo Bulk) and I also have the Quadro RTX A4000. However Ansys Fluent is accepting eather one of the GPUs as shown in this command:<\/p>\n<p>Calculation complete.<br \/>CUDA visible GPUs on WING49H<br \/>&nbsp; CUDA runtime version 6000<br \/>&nbsp; Driver version 12020<br \/>&nbsp; Number of GPUs 2<br \/>&nbsp; &nbsp; 0. NVIDIA GeForce RTX 3090 Ti (*)<br \/>&nbsp; &nbsp; &nbsp; &nbsp;84 SMs<br \/>&nbsp; &nbsp; &nbsp; &nbsp;1.86 GHz<br \/>&nbsp; &nbsp; &nbsp; &nbsp;25.7567 GBytes<br \/>&nbsp; &nbsp; 1. NVIDIA RTX A4000 (*)<br \/>&nbsp; &nbsp; &nbsp; &nbsp;48 SMs<br \/>&nbsp; &nbsp; &nbsp; &nbsp;1.56 GHz<br \/>&nbsp; &nbsp; &nbsp; &nbsp;17.171 GBytes<\/p>\n<p>I am using the Pressure Coupled Solver and the GPU is selected to run it. I tried it with each GPU seperate, but it still wont work. When i start the timebased calculation, the CPU is used 100%, but the selevted GPU (*) is only in use for 2% or 0%, which suggests that the GPU isnt in use at all!<\/p>\n<p>I have a big problem, because Ansys wont use the RTX Geforce GPU nor the Quadro RTX A4000 for the calculation within Ansys Fluent. I have istalled the newest drivers for the GPU cards and i use Ansys 2023 R1.<\/p>\n<p>Can someone help me with the problem or show me a workaround? Why won&acute;t Ansys use the selected GPU, even if only one is selected: <br \/>CUDA visible GPUs on WING49H<br \/>&nbsp; CUDA runtime version 6000<br \/>&nbsp; Driver version 12020<br \/>&nbsp; Number of GPUs 2<br \/>&nbsp; &nbsp; 0. NVIDIA GeForce RTX 3090 Ti <br \/>&nbsp; &nbsp; &nbsp; &nbsp;84 SMs<br \/>&nbsp; &nbsp; &nbsp; &nbsp;1.86 GHz<br \/>&nbsp; &nbsp; &nbsp; &nbsp;25.7567 GBytes<br \/>&nbsp; &nbsp; 1. NVIDIA RTX A4000 (*)<br \/>&nbsp; &nbsp; &nbsp; &nbsp;48 SMs<br \/>&nbsp; &nbsp; &nbsp; &nbsp;1.56 GHz<br \/>&nbsp; &nbsp; &nbsp; &nbsp;17.171 GBytes<\/p>\n<p>With best regards<\/p>\n","protected":false},"template":"","class_list":["post-292724","topic","type-topic","status-closed","hentry","topic-tag-fluent-ansys-1","topic-tag-GPGPU-1","topic-tag-gpu-acceleration"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 4.9.10 - aioseo.com -->\n\t<meta name=\"description\" content=\"Question: Ansys Fluent on RTX 3090 Ti and on Quadro RTX A4000 is not workingI am using Ansys Fluent (Research Licence) with the NVIDIA GeForce RTX 3090 Ti, 24GB (Zotac AMP Extreme Holo Bulk) and I also have the Quadro RTX A4000. 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