[mehmet23]

We are looking for a workstation with the following specs:

Field: CFD RANS, shape optimization, unsteady simulations, fluid-structure interaction (FSI)

mesh size: around 10 to 25 million cells

cores: infinite

Software: Ansys Fluent and Mechanical

budget: 10k to 25k $ (for the hardware)

As an initial selection, I have chosen the attached workstations from Titancomputers with approximately 18k $ for both choices...

1. Any preference between the 2 selections? it looks like the Epyc one is better but I'm not sure!!
2. Does anything look weird in these configurations?
3. any better suggestions? advices?...

Any help will be appreciated...
thanks in advance

[wkernkamp]

Both systems are offered with 8x32GB, that is 8 DIMMs. You need to have 16 DIMMS to use all memory channels.

[mehmet23]

Thank you for the notice... I will replace it with 16x16gb

[ErikAdr]

At that price range I would only consider systems with DDR5 memory. Memory bandwidth is important for CFD. Both Intel and AMDs newer CPUs are made for DDR5 memory. All memory channels should be used.

[mehmet23]

thanks for your reply

1) with a similar price, we have the 64 cores Genoa 9554 with 8x32gb DDR5... would it still be better than the 2xMilan 7573x with 16 DIMMs DDR4?

2) a better choice will be the 2xGenoa 9374F and 24x16gb RAM with additional 2k$... Does it worth it for my applications?

[CFDfan]

[QUOTE
Any help will be appreciated...
thanks in advance[/QUOTE]

I would be concerned about the coolers selected and suspect the CPUs will be thermally throttled (and run with lower speeds) and would've contacted the manufacturer to clarify that. For example, the TDP of the AMD processor is listed as up to 280W, while the selected AMD cooler has a TDP of 180W (https://www.amazon.com/3800rpm-P0064...s%2C121&sr=8-3).
This is not a good ratio to run the CPU at the turbo frequency.

I didn't check the corresponding parameters of the Intel system.

Also my first impression is that the systems are greatly overpriced. I would check the prices of the parts at Amazon and Newegg.

[mehmet23]

Originally Posted by CFDfan

I would be concerned about the coolers selected and suspect the CPUs will be thermally throttled (and run with lower speeds) and would've contacted the manufacturer to clarify that. For example, the TDP of the AMD processor is listed as up to 280W, while the selected AMD cooler has a TDP of 180W (https://www.amazon.com/3800rpm-P0064...s%2C121&sr=8-3).
This is not a good ratio to run the CPU at the turbo frequency.

Thanks for the comment. I think that the TDP on Amazon is not correct! I checked it on the supermicro website:
Supported CPU TDP: Up to 280 Watts
https://store.supermicro.com/us_en/4...-p0064ap4.html

Originally Posted by CFDfan

Also my first impression is that the systems are greatly overpriced. I would check the prices of the parts at Amazon and Newegg.

thanks again, this will be considered... Our concern at this stage is to find the best configuration with an estimate for the price limit.

[trampoCFD]

Hello Mehmet, I'd recommend you go with Genoa 9454 instead of 9374F.
Genoa Epyc processors have sufficient memory bandwidth for 48 cores.
I calculated the performance improvements in Star-CCM+ to be around 27%. I expect similar performance with Fluent, not sure with Mechanical.

[mehmet23]

Originally Posted by trampoCFD

Hello Mehmet, I'd recommend you go with Genoa 9454 instead of 9374F.
Genoa Epyc processors have sufficient memory bandwidth for 48 cores.
I calculated the performance improvements in Star-CCM+ to be around 27%. I expect similar performance with Fluent, not sure with Mechanical.

thanks for the advice