Desktop configuration for CFD purposes.

Zaber5 · June 2, 2019, 09:34

This is the first time I am building a PC for CFD simulations.
I have currently settled on the following build-

PROC : AMD Ryzen Threadripper 1920x
MOBO : AsRock X399 Taichi
RAM : G.Skill TridentZ 4x8GB
SSD : Samsung 970 Evo Plus

I have some doubts regarding the processor. How does it compare to some Intel processors like 7800x and 7820x? How does it compare to TR 2920x? Is it worth spending extra on 2920x? Are there any Xeons I should be looking at in my price range?

I will mainly be using Ansys Fluent and some ICEM with mesh sizes ranging from 2-10mil, both steady and transient simulations.

I'm currently using a laptop with i7-4720HQ, and 8GB RAM for my simulations. Should I expect a substantial performance increase?

Recommendations on any other components would be appreciated.

Thank you!

wkernkamp · June 2, 2019, 12:56

For CFD calculations the number of memory channels is important. The Epyc's have eight. In the hardware forum, you can see that the 16 core Epycs do very well: i.e. the 7301 and 7351.

Zaber5 · June 2, 2019, 13:05

But those are out of my price range.

wkernkamp · June 2, 2019, 15:54

Maybe second hand SP3 Epyc to get started and upgrade later on $389?
https://www.ebay.com/itm/AMD-EPYC-72...kAAOSwJOJcQfLV

Get a dual socket motherboard so that you can end up with two 16 core epyc's $450.
https://www.ebay.com/itm/Supermicro-...QAAOSwU2tc8HMs

June 2, 2019, 09:34	Desktop configuration for CFD purposes.	#1
Zaber5 New Member Abhishek Join Date: Dec 2018 Posts: 6 Rep Power: 7	This is the first time I am building a PC for CFD simulations. I have currently settled on the following build- PROC : AMD Ryzen Threadripper 1920x MOBO : AsRock X399 Taichi RAM : G.Skill TridentZ 4x8GB SSD : Samsung 970 Evo Plus I have some doubts regarding the processor. How does it compare to some Intel processors like 7800x and 7820x? How does it compare to TR 2920x? Is it worth spending extra on 2920x? Are there any Xeons I should be looking at in my price range? I will mainly be using Ansys Fluent and some ICEM with mesh sizes ranging from 2-10mil, both steady and transient simulations. I'm currently using a laptop with i7-4720HQ, and 8GB RAM for my simulations. Should I expect a substantial performance increase? Recommendations on any other components would be appreciated. Thank you!

June 2, 2019, 12:56	have a look at AMD Epyc processors	#2
wkernkamp Senior Member Will Kernkamp Join Date: Jun 2014 Posts: 354 Rep Power: 14	For CFD calculations the number of memory channels is important. The Epyc's have eight. In the hardware forum, you can see that the 16 core Epycs do very well: i.e. the 7301 and 7351.

June 2, 2019, 15:54	Buy used on ebay?	#4
wkernkamp Senior Member Will Kernkamp Join Date: Jun 2014 Posts: 354 Rep Power: 14	Maybe second hand SP3 Epyc to get started and upgrade later on $389? https://www.ebay.com/itm/AMD-EPYC-72...kAAOSwJOJcQfLV Get a dual socket motherboard so that you can end up with two 16 core epyc's $450. https://www.ebay.com/itm/Supermicro-...QAAOSwU2tc8HMs

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June 2, 2019, 13:05		#3
Zaber5 New Member Abhishek Join Date: Dec 2018 Posts: 6 Rep Power: 7	But those are out of my price range.