{"id":284591,"date":"2023-05-18T05:46:11","date_gmt":"2023-05-18T05:46:11","guid":{"rendered":"\/forum\/forums\/topic\/low-performance-on-amd-epyc-in-fluent\/"},"modified":"2023-05-18T05:50:59","modified_gmt":"2023-05-18T05:50:59","slug":"low-performance-on-amd-epyc-in-fluent","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/low-performance-on-amd-epyc-in-fluent\/","title":{"rendered":"Low performance on AMD Epyc in Fluent"},"content":{"rendered":"

I tested the same Fluent setup on 3 different machines. Both AMD cpus 5800x and 2x Epyc 7532 are experiencing declining performance as the used core number increases. While, 2xE5-2697A has rising performance up to 8 cores (since the Fluent setup itself isn’t very heavy). <\/p>\n

I looked up for the similar problems and the most common reason appears to be somehow conntected to msmpi.<\/p>\n

Could it be somehow connected to CPU or Chipset drivers? I’m using Win 10 Pro N, should I be using Windows server?<\/p>\n

 <\/p>\n

As for the BIOS settings, I’m using whatever AMD is recommending for the Fluent.<\/p>\n

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