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Adept I
Adept I

FEA 5 times slower with EPYC 7542


I hope somebody can help me with the following issue:

We have bought a new workstation for FEA simulations (vehicle crash etc.). Unfortunately we are not getting the expected performance.

Our System:

  • AMD EPYC 7542 32-Core Processor
  • Sockets = 2
  • 64 physical cores (128 Threads)
  • 265 GB Ram (8 x 32 GB DDR4 3200) -> so on every second slot
  • OS Win 10

Accroding to the following Benchmark for an older CPU the simulation time should be under 2000 seconds:

With our current configuration the same simulation model (Neon1M11) needs 10000 seconds (5 times longer).

For the calculation we are using Intel MPI (-mpi -i -np 64). From altair we got following recommendations for the envoirnment variables which already helped that the programm actually using all cores:



And we turned off hyperthreading in the BIOS.

But still the simulations are 5 times slower tahn expected. 

Other Benchmark like Cinebench are performing as expected. 

Are there any further settings we have missed?

Thanks in advance


Best regards 



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1 Reply

Re: FEA 5 times slower with EPYC 7542

Sorry to hear and not sure if you found a resolution or not, but our internal testing on EPYC 7542 using Radioss 2018 neon benchmark completed in 175 seconds. However, this performance was measured on RHEL 7.7 (3.10.0-1062.el7.x86_64) running Altair RADIOSS™ 2018 neon with a single-node, 2x AMD EPYC™ 7F52 (16C) processor-based System, 16x Micron™ 64GB DDR4-3200 DR 1DPC, Mellanox™ CX-6 HDR 200 Gb/s IB x16 PCIe® Gen 4, 1x Micron 1100 256 GB SATA (OS), 1x1 TB NVMe (Data), BIOS settings: Defaults, plus NPS=NPS4 (7F52), SMT = Off, Boost = On, APBDIS=1, Fixed SOC P state=P0, DLWM=off, X2APIC = On, Determinism Slider = Performance, Preferred IO=Enabled. 

The Workload Tuning Guide has some guidance along with the Windows Tuning Guide (although targeted towards Server versions - I am not sure if it all applies to Win10) 

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