Hardware Recommendations and Certifications

View the most recent recommended graphic boards, laptops and desktop hardware configurations.

Recommended Graphics Boards

Recommended CAE/CAD graphic boards to use with Altair HyperWorks applications.

The most recent vendor/manufacturer drivers should be used and all driver support for these cards should be addressed to the appropriate manufacturer of the graphic board.

Added Intel® Arc™ support.

Note: AMD and Intel® Arc™ graphics cards are not supported on Linux x86_64 operating systems in Altair HyperWorks 2022 and higher products.

Intel Arc Graphics Cards

Products GPU Model Driver Version
Intel® Arc™ A40

A50

Windows 10/11 (64-bit)
31.0.101.4316
Linux (64-bit)
Not Supported
Intel® Arc™ mobility

A30M

A40M

Windows 10/11 (64-bit)
31.0.101.4316
Linux (64-bit)
Not Supported

AMD Graphics Cards

Products GPU Model Driver Version
Radeon™ Pro

W7900

W7800

W7600

W7500

W6800

W6600

W6400

VII

WX 9100

W5700

WX 8200

W5500

WX 7100

WX 5100

WX 4100

WX 3200

WX 3100

WX 2100

Windows 10/11 (64-bit)
24.Q1
Linux (64-bit)
Not Supported
Radeon™ Pro Mobility

W6600M

WX 7130

WX 7100

WX 4170

WX 4150

WX 4130

WX 3100

WX 2100

Windows 10/11 (64-bit)
24.Q1
Linux (64-bit)
Not Supported

NVIDIA Graphics Boards

Products GPU Model Driver Version
P

(Pascal)

V

(Volta)

RTX

(Turing)

A*

(Ampere)

Ada Generation
Quadro/NVIDIA Series P400

P420

P600

P620

P1000

P2000

P2200

P4000

P5000

P5200

P6000

GP100

GV100 RTX 3000

RTX 4000

RTX 5000

RTX 6000

RTX 8000

T400

T600

T1000

RTX A2000

RTX A3000

RTX A4000

RTX A4500

RTX A5000

RTX A6000

RTX 4000 Ada SFF

RTX 4000 Ada

RTX 4500 Ada

RTX 5000 Ada

RTX 6000 Ada

Windows 10/11 (64-bit)
R535 U8 537.70
Linux (64-bit) ODE Long Live
535.129.03
Quadro/NVIDIA Mobility P500

P520

P600

P620

P1000

P2000

P3000

P3200

P4000

P4200

P5000

P5200

T400

T550

T600

T1000

T1200

T2000

RTX 3000

RTX 4000

RTX 5000

RTX A500

RTX A1000

RTX A2000

RTX A3000

RTX A4000

RTX A4500

RTX A5000

RTX A5500

RTX 1000 Ada

RTX 2000 Ada

RTX 3000 Ada

RTX 3500 Ada

RTX 4000 Ada

RTX 5000 Ada

Windows 10/11 (64-bit)
R535 U8 537.70
Linux (64-bit) ODE Long Live
535.129.03
Note:
Minimum OpenGL 3.2, Vulkan 1.2 and OpenCL 2.1 Requirement
Virtual server/clients and VirtualGL setups may work, but are not officially tested or supported.
NVIDIA Optimus or AMD Switchable Graphics
In order to ensure best performance, these options should be set to use discrete NVIDIA or AMD GPU and not the Intel GPU.
Power Options and Mobility Center
In order to ensure best performance, these options should be maximum performance for both GPU and CPU.
Graphics Driver Corruption or Installation Issues
In order to ensure best driver compatibility, it is recommended to use “Custom” and “Clean” install options instead of the general “Express” driver installer options.

Recommended Workstation Desktop and Laptop/Notebook Hardware

DELL Workstations - Desktops

Product Precision Workstation
Workstation Model NVIDIA Quadro GPU AMD Radeon™ Pro GPU
3260 T400

T1000

RTX A2000

RTX 3000 Ada

3460 (mini) RTX 3000
3460 SFF T400

T1000

RTX A2000

3650

T400

T1000

RTX A2000

RTX A4000

RTX A5000

RTX A5500

RTX A6000

W5500

W5700

W6600

W6800

WX3200

3660T T400

T1000

RTX A2000

RTX A4000

RTX A4500

RTX A5000

RTX A5500

RTX A6000

5860T T400

T1000

RTX A2000

RTX A4000

RTX A4500

RTX A5000

RTX A5500

RTX A6000

W6300

W6400

W6600

W6800

7865T T400

T1000

RTX A2000

RTX A4000

RTX A4500

RTX A5000

RTX A5500

RTX A6000

GV100

7960T T400

T1000

RTX A2000

RTX A4000

RTX A4500

RTX A5000

RTX A5500

RTX A6000

W6300

W6400

W6600

W6800

7960 Rack T400

T1000

RTX A2000

RTX A4000

RTX A4500

RTX A5000

RTX A5500

RTX A6000

W6300

W6400

W6600

W6800

DELL Workstations - Laptops

Product Precision Workstation
Workstation Model NVIDIA Quadro GPU AMD Radeon™ Pro GPU
3470 T550
3480 RTX A500
3560 T500
3561 T600

T1200

3570 T550

T600

RTX A500

3571 T600

RTX A1000

RTX A2000

3580

RTX A500

3581

RTX A500

RTX A1000

RTX 2000 Ada

5470 RTX A1000
5480

RTX A1000

RTX 2000 Ada

RTX 3000 Ada

5560 T1200

RTX A2000

5570 RTX A1000

RTX A2000

5680

RTX A1000

RTX 2000 Ada

RTX 3500 Ada

RTX 4000 Ada

RTX 5000 Ada

5760 RTX A2000

RTX A3000

N/A
5770 RTX A2000

RTX A3000

7560 T1200

RTX A2000

RTX A3000

RTX A4000

RTX A5000

7670 RTX A1000

RTX A2000

RTX A3000

RTX A4500

RTX A5500

7680 RTX A1000

RTX 2000 Ada

RTX A3500 Ada

RTX 4000 Ada

RTX 5000 Ada

7760 T1200

RTX A3000

RTX A4000

RTX A5000

7770 RTX A1000

RTX A3000

RTX A4500

RTX A5500

N/A
7780 RTX A1000

RTX 2000

RTX 3500 Ada

RTX 4000 Ada

RTX 5000 Ada

Lenovo Workstations - Desktops

Product Lenovo ThinkStation
Workstation Model NVIDIA Quadro GPU (442.92 or higher) AMD Radeon™ Pro GPU Intel Arc GPU
P2 TWR A400

A1000

RTX A2000

RTX A4000

RTX 2000 (E) Ada

T400 (E)

T1000

P340 SFF /

P340 TWR*

RTX A2000*

RTX 4000*

RTX 5000*

RTX A4000*

RTX A5000*

RTX 2000 (E) Ada

T400

T600

T1000

P340 Tiny T1000

RTX 2000 (E) Ada

P348 T400

T600

T1000

RTX 2000 (E) Ada

P350 SFF /

P350 TWR*

RTX A2000

RTX A4000*

RTX A5000*

RTX 2000 (E) Ada

T400

T600

T1000

P350 Tiny RTX 2000 (E) Ada

T600

T1000

P358 TWR RTX A2000

RTX 2000 (E) Ada

T600

T1000

P360 Ultra*/

P360 TWR

RTX A2000

RTX A4000

RTX A4500

RTX A5000

RTX A5000m*

RTX 2000 (E) Ada

T400

T600

T1000

P360 Tiny

RTX 2000 (E) Ada

T400

T1000

P3 Tiny

T400

T1000

P3 TWR A400

A1000

RTX A2000

RTX A4000

RTX A4500

RTX A5000

RTX A5500

RTX 2000 (E) Ada

RTX 4000 Ada

RTX 4500 Ada

RTX 5000 Ada

RTX 5880 Ada

T400 (E)

T1000

P3 Ultra

A400

A1000

RTX A2000

RTX A3000 mobility

RTX A5000 mobility

RTX A5500 mobility

RTX A2000 Ada

RTX A4000 Ada

T400

T1000

A40 Pro
P520* / P520c T4000

T1000

GV100

RTX A2000

RTX A4000

RTX A4500

RTX A5000

RTX A5500

RTX A6000*

RTX 2000 (E) Ada

N/A
P5

RTX A2000

RTX A4000

RTX A4500

RTX A5500

RTX A6000

RTX 2000 (E) Ada

RTX 4000 Ada

RTX 4500 Ada

RTX 5000 Ada

RTX 5880 Ada

RTX 6000 Ada

T400 (E)

T1000

P620 (AMD Ryzen PRO 3975X) /

(AMD Ryzen Threadripper PRO 5955WX)

RTX A2000

RTX A4000

RTX A4500

RTX A5000

RTX A5500

RTX A6000

RTX 2000 (E) Ada

RTX 4000 Ada

RTX 5000 Ada

RTX 5880 Ada

RTX 6000 Ada

T400

T1000

W7600

W7900

P720 / P920 RTX 4000

RTX 5000

RTX 6000

RTX 8000

RTX A2000

RTX A4000

RTX A4500

RTX A5000

RTX A5500

RTX A6000

RTX 2000 (E) Ada

T400

T600

T1000

P7

RTX A2000

RTX A4000

RTX A4500

RTX A5500

RTX A6000

RTX 2000 (E) Ada

RTX 4000 Ada

RTX 4500 Ada

RTX 5000 Ada

RTX 5880 Ada

RTX 6000 Ada

T400 (E)

T1000

P8 A400

A1000

RTX A2000

RTX A4000

RTX A6000

RTX 2000 (E) Ada

RTX 4000 Ada

RTX 4500 Ada

RTX 5000 Ada

RTX 5880 Ada

RTX 6000 Ada

T400 (E)

T1000

W6400

W7600

W7900

PX A400

A1000

RTX A2000

RTX A4000

RTX A4500

RTX A5500

RTX A6000

RTX 2000 (E) Ada

RTX 4000 Ada

RTX 4500 Ada

RTX 5000 Ada

RTX 5880 Ada

RTX 6000 Ada

T400 (E)

T1000

Lenovo Workstations - Laptops (*Windows 10 support only)

Product Workstation Model
Lenovo ThinkPad NVIDIA Quadro GPU AMD Radeon™ Pro GPU Intel Arc GPU
P1

Gen4

T1200

RTX A2000

RTX A3000

RTX A4000

RTX A5000

P1

Gen5

RTX A1000

RTX A2000

RTX A3000

RTX A4500

RTX A5500

P1

Gen6

RTX A1000

RTX 2000 Ada

RTX 3500 Ada

RTX 4000 Ada

RTX 5000 Ada

P14s

Gen1

P520 AMD Ryzen 7 PRO 4750U with Radeon Graphics (2 GB)

AMD APU 4400

P14s

Gen2

T500 AMD APU 5500
P14s

Gen3a

N/A Radeon PRO Graphics
P14s

Gen3i

T550
P14s

Gen4

RTX A500 AMD Ryzen 7 PRO 7840U with Radeon 780M
P15

Gen1

T1000

T2000

RTX 3000

RTX 4000

P15

Gen2

T1200

RTX A2000

RTX A3000

RTX A4000

RTX A5000

P15s

Gen2

T500
P15v

Gen2

T600

T1200

RTX A2000

P15v

Gen3a/Gen3i

T600

T1200

RTX A2000

P16

Gen1

RTX A1000

RTX A2000

RTX A3000

RTX A4500

RTX A5500

P16

Gen2

RTX A1000

RTX 1000 Ada

RTX 2000 Ada

RTX 3500 Ada

RTX 4000 Ada

RTX 5000 Ada

A30M
P16s

Gen1a

Radeon PRO Graphics
P16s

Gen1i

T550
P16s

Gen2

RTX A500 AMD Ryzen 7 PRO 7840U with Radeon 780M
P16v

Gen1

RTX A500

RTX A1000

RTX 2000 Ada

P17

Gen1

T1000

T2000

RTX 3000

RTX 4000

RTX 5000

P17

Gen2

RTX A4000

RTX A5000

P73*

T2000

RTX 3000

RTX 4000

RTX 5000

Acer Workstations and Laptops (*Windows 10 support only)

Product Acer
Workstation Model NVIDIA Quadro GPU AMD Radeon™ Pro GPU
ConceptD

500*

RTX 4000
ConceptD

700*

RTX 4000
Veriton

K8

RTX 4000
Veriton

K8690G

RTX A4000
Product Acer
Mobile Workstation Model NVIDIA Quadro GPU AMD Radeon™ Pro GPU
ConceptD 3

Pro*

T1000
ConceptD 3

Ezel Pro*

T1000
ConceptD 5

Pro*

RTX 3000
ConceptD 7

Pro*

RTX 3000
ConceptD 7

Ezel Pro*

RTX 5000

Altos Workstations and Laptops (*Windows 10 support only)

Product Altos

Computing

Workstation Model NVIDIA Quadro GPU AMD Radeon™ Pro GPU
BrainSphere™

P130 F5

RTX 2000
BrainSphere™

P530 F4

RTX 2000

RTX 4000

RTX 5000

SuperMicro Workstations

Product SuperMicro
System Model

AS- 5014A-TT

NVIDIA Quadro GPU AMD Radeon™ Pro GPU
Mainstream

Ryzen Threadripper Pro 3955WX

RTX A4500 W6800
Performance

Ryzen Threadripper Pro 3975WX

RTX A4500 W6800
Expert

Ryzen Threadripper Pro 3995WX

RTX A4500 W6800
(visit SuperMicro for a complete GPU support list)

Comments

For NVIDIA GPU based laptops/notebooks the Optimus power saving option in the BIOS should be disabled and the NVIDIA drivers properly installed for optimal performance in Altair HyperWorks products.

For AMD GPU based laptops/notebooks; the Enduro/Switchable Graphics power saving option should be disabled and the AMD drivers properly installed for optimal performance in Altair HyperWorks products.

Optimus (Intel/NVIDIA) enabled drivers may create performance issues with notebooks/laptops compared to a dedicated non-shared GPU driver. Disabling the Optimus feature in BIOS, if available, will help give the best overall graphics performance.

Disable nView Window manager under NVIDIA drivers if you experience random crashes and/or issues.

All power saving modes, settings and governors for CPU frequencies and GPU performance should be set to maximum settings in order to get the optimal performance out of Altair HyperWorks products. This includes smooth graphics and high frame rates (FPS) on Windows and Linux platforms.

Altair HyperWorks 2024 Solver Hardware Configuration Recommendations

Recommended hardware configurations for Altair Solvers.

AcuSolve Solver

Table 1.
Problem Size Small Medium Large
Typical Workload

Steady State or Transient

Steady state: Up to 1M nodes

Transient: Up to 100K nodes

Steady state: Up to 10M nodes

Transient: Up to 1M nodes

Steady state: Greater than 10M nodes

Transient: Greater than 1M nodes

Throughput 1 Single job Single job Single job
CPU 2 Dual CPU socket

For example, Intel Xeon Gold “Cascade Lake” or “Ice Lake” or AMD EPYC 7002 or 7003 series

Dual CPU socket

For example, Intel Xeon Gold “Cascade Lake” or “Ice Lake” or AMD EPYC 7002 or 7003 series

Dual CPU socket

For example, Intel Xeon Gold “Cascade Lake” or “Ice Lake” or AMD EPYC 7002 or 7003 series

Number of CPU / node 1-4 1-4 1-4
Number of cores / node 32 – 128 32 – 128 32 – 128
Number of nodes 1-8 8 – 48 >48
Minimum Memory Configuration / node 3 300MB to 3GB 3GB to 30GB More than 30GB

(3KB per CFD node)

Storage (minimum) 500 GB SATA or SSD 1.5 TB local storage 1.5 TB local storage
Network Interconnect Gigabit Ethernet Or Infiniband Infiniband Infiniband
Operating System Linux kernel 2.6.32 or higher

Windows 7 or 10

Linux kernel 2.6.32 or higher Linux kernel 2.6.32 or higher
GPU Yes Yes Yes
MPI Intel MPI 2018.4 or higher Intel MPI 2018.4 or higher Intel MPI 2018.4 or higher
Setup

(2000-3000 computational nodes per core)

Pure OpenMP or Hybrid OpenMP/MPI Hybrid OpenMP/MPI Hybrid OpenMP/MPI
Hyper Threading Not recommended Not recommended Not recommended

Feko Solver

Table 2.
Problem Size Small Medium Large
General recommendations given for MoM and MLFMM dependent on problem size in terms of number of unknowns / mesh elements. For other solution methods (FEM, FDTD, RL-GO, PO, UTD) many factors to be considered. Pure Mom: less than 50k unknowns.

MLFMm: between 100k and 500k unknowns

Pure Mom: between 50k and 100k unknowns.

MLFMm: between 500k and 5M unknowns

Pure Mom: >100k unknowns

MLFMm: >5M unknowns

Throughput 1 Single job Single large job or few jobs in parallel Single very large job or multiple jobs
CPU 2 Dual CPU socket

For example, Intel Xeon Gold “Cascade Lake” or “Ice Lake” or later

Dual CPU socket

For example, Intel Xeon Gold “Cascade Lake” or “Ice Lake” or later

Dual CPU socket

For example, Intel Xeon Gold “Cascade Lake” or “Ice Lake” or later

Number of CPU / node 2 2 2
Number of cores / node 32 – 56 32 – 56 32 – 56
Number of nodes 1 8 – 16 > 16
Minimum Memory Configuration / node 3 64 GB 128 GB 256 GB
Storage (minimum) 500 GB SATA or SSD 500 GB SATA or SSD 500 GB SATA or SSD
Network Interconnect Gigabit Ethernet Infiniband Infiniband
Operating System RHEL or CentOS 8.3

Windows 10

Linux kernel 2.6.32 or higher Linux kernel 2.6.32 or higher
GPU Yes No No
MPI Intel MPI 2018.4 or higher Intel MPI 2018.4 or higher Intel MPI 2018.4 or higher
Setup Pure MPI Pure MPI Pure MPI
Hyper Threading Not recommended Not recommended Not recommended

Flux Solver

Table 3.
Problem type Small Medium Large
Typical Workload (depending on number of DOF, element type, and other factors) < 300 000 DOF Around 500 000 DOF Around 5M DOF
Throughput 1 Single Single Single
CPU 2 Dual CPU socket

For example, Intel Xeon Gold “Cascade Lake” or “Ice Lake”

Dual CPU socket

For example, Intel Xeon Gold “Cascade Lake” or “Ice Lake”

Dual CPU socket

For example, Intel Xeon Gold “Cascade Lake” or “Ice Lake”

Number of CPU / node 1 2 2
Number of cores / node 8 16 16+
Number of nodes 1 1 1-4
Minimum Memory Configuration / node 3 8 GB 16-32 GB 300GB
Storage (minimum) 500 GB SATA or SSD 1 TB local storage SSD 1.5 TB local storage SSD
Network Interconnect Infiniband
Operating System Linux kernel 3.10.0-693 or higher

Windows 7 or 10 with SSD

Linux kernel 3.10.0-693 or higher

Windows 7 or 10 with SSD

Linux kernel 3.10.0-693 or higher

Windows 7 or 10 with SSD

GPU No No No
MPI Intel MPI 2018.4 or higher Intel MPI 2018.4 or higher Intel MPI 2018.4 or higher
Setup SMP SMP or Hybrid 2MPI/node SMP or Hybrid 2MPI/node
Hyper Threading Not recommended Not recommended Not recommended

Radioss Solver

Table 4.
Problem Size Small Medium Large
Typical Workload

Crash & Impact

Component tests, sled test, drop test, …

Less than 500K elements

Medium crash model, between 1 and 6 millions of elements model Accurate car crash model (rupture), very large model with size > 6 million elements
Throughput 1 Single job Single large job or few jobs in parallel Single very large job or multiple jobs
CPU 2 Dual CPU socket

For example, Intel Xeon Gold “Cascade Lake” or “Ice Lake” or AMD EPYC 7002 or 7003 series

Dual CPU socket

For example, Intel Xeon Gold “Cascade Lake” or “Ice Lake” or AMD EPYC 7002 or 7003 series

Dual CPU socket

For example, Intel Xeon Gold “Cascade Lake” or “Ice Lke” or AMD EPYC 7002 or 7003 series

Number of CPU / node 2 2 2
Number of cores / node 32 – 64 32 – 128 32 – 128
Number of nodes 1 8 – 16 > 16
Minimum Memory Configuration / node 3 64-128GB 64-256GB 64-256GB
Storage (minimum) 500 GB SATA or SSD 1,5 TB local storage 1,5 TB local storage
Network Interconnect Gigabit Ethernet Infiniband Infiniband
Operating System Linux kernel 2.6.32 or higher

Windows 7 or 10

Linux kernel 2.6.32 or higher Linux kernel 2.6.32 or higher
GPU No No No
MPI Intel MPI 2018.4 or higher Intel MPI 2018.4 or higher Intel MPI 2018.4 or higher
Setup Pure MPI Pure MPI or Hybrid with 2 or 4 OpenMP threads per MPI Hybrid with 2 or 4 OpenMP threads per MPI
Hyper Threading 5 Yes, Hybrid with 2 OpenMP per MPI Not recommended Not recommended

OptiStruct Solver

Table 5.
Problem type Small or medium Large static Large dynamic
Typical Workload (depending on number of DOF, element type, and other factors) Nonlinear - less than 2M DOF; linear static - less than 5M DOF; NVH - less than 5M DOF Nonlinear - more than 2M DOF; linear static - more than 5M DOF NVH - more than 5M DOF
Throughput 1 Single Single Single or few jobs in parallel
CPU 2 Dual CPU socket

For example, Intel Xeon Gold “Cascade Lake” or “Ice Lake”

Dual CPU socket

For example, Intel Xeon Gold “Cascade Lake” or “Ice Lake

Dual CPU socket

For example, Intel Xeon Gold “Cascade Lake” or “Ice Lake"

Number of CPU / node 2 2 2
Number of cores / node 8-24 24+ 24+
Number of nodes 1 1-8 1-8
Minimum Memory Configuration / node 3 16-64GB 128GB 256GB
Storage (minimum) 512GB local storage 1TB local storage 3 TB local storage, SSD and RAID0 recommended
Network Interconnect Infiniband Infiniband
Operating System Linux kernel 2.6.32 or higher

Windows 7 or 10 with SSD

Linux kernel 2.6.32 or higher

Windows 7 or 10 with SSD

Linux kernel 2.6.32 or higher

Windows 7 or 10 with SSD

GPU Yes Yes Yes (Eigenvalue Extraction – AMSES or Lanczos)
MPI Linux: Intel MPI 2018.4 (recommended)

Windows: Intel MPI 5.1.0.078 (recommended)

Linux: Intel MPI 2018.4 (recommended)

Windows: Intel MPI 5.1.0.078 (recommended)

Linux: Intel MPI 2018.4 (recommended)

Windows: Intel MPI 5.1.0.078 (recommended)

Setup SMP or DDM hybrid or SMP+GPU DDM hybrid or SMP+GPU SMP or DDM hybrid or SMP+GPU
Hyper Threading Not recommended Not recommended Not recommended

Recommended GPU Computing Processor List

Recommended graphic boards for use with the Altair Solver applications for high-powered GPU computing.

The following table lists the recommended graphic boards for use with the Altair Solver applications for high-powered GPU computing.
Manufacturer and Model Graphics Card Driver Version

(Minimum or Higher)

AcuSolve NVIDIA

(Tesla)

P100

V100

Linux (64-bit)

418.39

Windows (64-bit)

396.26

NVIDIA

(Quadro)

GP100

GV100

Linux (64-bit)

418.39

Windows (64-bit)

396.26

OptiStruct NVIDIA

(Tesla)

P100

V100

Linux (64-bit)

440.33

Windows (64-bit)

441.22

NVIDIA

(Quadro)

GP100

GV100

Linux (64-bit)

440.33

Windows (64-bit)

441.22

Note:
  • The most recent vendor/manufacturer drivers should be used and all driver support for these cards should be addressed to the appropriate manufacturer of the graphics board.
  • Double Precision GPU cards should be used to run OptiStruct. Single precision GPU cards (such as RTX 600, etc) are not recommended for OptiStruct runs.

Additional Information on Driver Installations

The NVIDIA Driver Update recommendation is to use the Custom installation option and select the Perform clean installation option to validate that there are no conflicts in DLL/drivers.

The same should be done with AMD hardware and drivers as well using AMD’s custom uninstall tools.
Figure 1.


1 Number of simultaneous jobs. Use of a workload management middleware like Altair PBS is highly recommended to insure optimal and dedicated usage of the CPU resource
2 Typical node configuration is based on dual CPU socket processors
3 It is extremely important to populate all the memory banks on the mother board.
4 In Hybrid mode, it is recommended to set a number of MPIs that is a multiple of the number of sockets and then set the number of OpenMP in a way that number of MPIs x number of OpenMP equal number of physical cores.
5 Hyper Threading (HT) may increase performance by around 10% on single node. In this case, recommended setup is to run 2 OpenMP per MPI, with a number of MPIs that matches the total number of physical cores on the node. On multi-node, it is better not using HT