Learning Forum

[shin7]

I am using ANSYS 2023 CFX in Windows server.

When I summit job, CFX does not work sometimes.

So I changed the machine From AMD 7742 to Intel CPU Server!

then The problem is solved!

I think CFX has some problem with AMD EPYC 7742.

More detaily, Intel MPI 2018 version has some problems with AMD 7742 CPU!

I want to know how to sovle the problem!

Can I change CFX's Intel MPI version in Workbench environment?

 

[Rob Blumenthal]

There have been a couple of reported cases related to this processor with Intel MPI.  It's under investigation.  In the mean time, please try using the "Microsoft MPI local parallel" option for running parallel.

[shin7]

 

Thanks your reply!

I think you know the performance of MSMPI is very very poor!

So I can’t use MS-MPI!

Linux OS version use more later version of Intel MPI than Windows!

So I think ANSYS already knew the bug about Intel MPI with 7742 CPU.

But You did not make any modifications!

I hope ANSYS makes new version of CFX using new INTEL MPI!

Can you give me the schedule for solving this bug?

How long should I wait for the solution?

If you need my help about solving the problem, contact me any time!

 

 

 

[shin7]

When can I get the solution about Intel MPI ?

I used over 100 thousand dollars in my server about 2.5 years ago!

But the server has been just idling with cosuming electricity!

ANSYS must show responsibility with this problem!