[vbryansm]

Hello Foamers

I'm currently running detailed CFD simulations on my system, which has an Intel i9-12900K with 4x 16GB DDR5 5200* (edit) MHz memory. I'm curious if this is a good combination for my needs, or if I am bottlenecking somewhere. Should I consider increasing the number of performance cores (currently at 8)? Perhaps a dual-processor motherboard with lower frequency but more cores would be a better choice?

I've also been considering the i9-13900K, which has 8 performance cores and 16 efficiency cores. Would this improve my CFD simulation performance? Or should I focus only on the performance cores when making a decision?

Maybe go for i9-13900K and 64 Gb DDR5 6000MT/s?

Any advice or recommendations would be greatly appreciated!

Best regards,

[flotus1]

General recommendations for CFD hardware [WIP]

0. Checklist before posting
When posting a question about buying a new computer, please try to answer as many of these questions as you can in the first post:

1. Which software do you intend to use?
2. Are you limited by license constraints? I.e. does your software license only allow you to run on N threads?
3. What type of simulations do you want to run? And what's the maximum cell count?
4. If there is a budget, how high is it?
5. What kind of setting are you in? Hobbyist? Student? Academic research? Engineer?
6. Where can you source your new computer? Buying a complete package from a large OEM? Assemble it yourself from parts? Are used parts an option?
7. Which part of the world are you from? It's cool if you don't want to tell, but since prices and availability vary depending on the region, this can sometimes be relevant. Particularly if it's not North America or Europe.
8. Anything else that people should know to help you better?

One thing is for certain though: upgrading to an I9-13900k from an I9-12900k won't change much. They have the same amount of P-cores with very similar performance. More E-cores don't help with CFD performance.

[vbryansm]

Originally Posted by flotus1

General recommendations for CFD hardware [WIP]


One thing is for certain though: upgrading to an I9-13900k from an I9-12900k won't change much. They have the same amount of P-cores with very similar performance. More E-cores don't help with CFD performance.

Thank you for the instructions.

But would changing the RAM memory speed make a difference? because the 12th generation cannot reach, for example, 7200 MT/s.

[flotus1]

Neither can 13th gen. Not with anything more than 2x16GB at least.
Of course, increasing memory transfer rate does help. But at best, it's a linear increase. Realistically, it will be less than that. Swapping a perfectly good CPU and buying different RAM has very limited potential.

[Stabum]

Originally Posted by flotus1

General recommendations for CFD hardware [WIP]


One thing is for certain though: upgrading to an I9-13900k from an I9-12900k won't change much. They have the same amount of P-cores with very similar performance. More E-cores don't help with CFD performance.

VERY interesting!
So, between a i9 14900 (with 8 Pcores and 16Ecores) and a Ryzen 9 7950x (with 16 Pcores), and let's suppose, the same amount and kind of memory (both the systems are 2-channel memory), would you suggest AMD?