Platform: Windows, Linux Applies to: COMSOL Multiphysics® Versions: 6.2


Version 4.1.1 of AMD Optimizing CPU Libraries (AOCL) is a custom AOCL build optimized for COMSOL that is included in COMSOL Multiphysics version 6.2 as alternative BLAS and LAPACK libraries.

When using AOCL 4.1.1 on computers equipped with AMD Zen 4-based processors (AMD Ryzen™ Threadripper™ PRO 7000 WX-Series, 4th Generation AMD EPYC™ Processors), we have measured a significant performance boost for many models compared to when the default BLAS library is used. For performance improvement figures, see this page.

To enable the use of AOCL 4.1.1 by COMSOL Multiphysics 6.2 on AMD Zen-based processors, do the following:


Right-click the COMSOL Multiphysics 6.2 icon and select Properties. At the end of the Target: field, add

-blas aocl

. The whole Target field should look like this:

"C:\Program Files\COMSOL\COMSOL62\Multiphysics\bin\win64\comsol.exe" -blas aocl


Start the COMSOL software with the command

comsol -blas aocl

AMD Ryzen Threadripper and AMD EPYC are trademarks of Advanced Micro Devices, Inc.