[petsc-users] AMD vs Intel mobile CPU performance

[Jed Brown]

If you're using iterative solvers, compare memory bandwidth first, then cache. Flops aren't very important unless you use sparse direct solvers or have SNES residual/Jacobian evaluation that is expensive and has been written for vectorization.

If you can get the 6650U with LPDDR5-6400, it'll probably be faster. My laptop is the previous generation, 5900HS.

"D.J. Nolte" <d.j.nolte at rug.nl> writes:

> Hi all,
> I'm looking for a small laptop which I'll be using (also) for small scale
> PETSc (KSP & SNES) simulations. For this setting performance is not that
> important, but still, I wonder if the community has any experience with AMD
> Ryzen CPUs (specifically 5 Pro 6650U) CPUs compared to Intel i7 12th gen.
> Do I have to expect significant performance differences?
>
> Thanks!
>
> David