Hiya,

Just some quick benchmarks for flip simulations.
AMD 3990X 64 core
AMD 3975WX 32 core Pro.

Benchmark: Flip Sim
Houdini Benchmark Flip scene
Solver. Save to Disk
3975WX 1min17 - 3.96-4GHz SMT ON. 32 cores.
3990X 1min17s 3200MHZ RAM SMT Off. Cpu usage was about 75-80% and speed around 3.6GHz. 64 cores
3990X 1min55s 2133MHZ RAM SMT On. This uses slower memory settings.
3990X 1min43s 3200MHZ RAM SMT On

Comment. 32 Core Pro and 64 core has identical speed for the solver.
This is probably because this step is not that well multithreaded, and the Pro has better memory usage and also a bit higher clock speed. You can also see that disabling SMT (hyperthreadding) increase the sim speed.

Geometry building
3990X 2min25 3200Mhz SMT OFF. This step is at 100% so we can see its a bit faster than the Pro
3990X 2min56s. This used 100% of the cores at 3.5GHz
3975WX 2min43 - pretty much fully core utilisation at 3.8-3.9GHz

Windows 10. Air cooled systems.

I could maybe upload the file for others to test. Its not a very heavy flip, so worth testing higher res of it.
What I ideally would like is that we get 64 core AMD with more modern Zen 4 or similar. Zen 2 which is what 3990x is using is a bit old. In other programs like Terragen the 64 had a bigger advantage than this, about 50% faster than the 32 core.

You can also try slicing your sim and run in parallel, but memory could be a bottleneck depending on how much you have.

animatrix_
You can also try slicing your sim and run in parallel, but memory could be a bottleneck depending on how much you have.

Aha, so you mean slicing the sim and running 2 sims at the same computer? Or just to do it over multiple computers?