hello @study100 and welcome to the community!
There are a few threads on this topic, and although they are from some time ago, the principles still apply in general.
https://community.mrtrix.org/t/finding-a-powerful-pc-for-multishell-preprocessing-tractogrpahy/413
https://community.mrtrix.org/t/pc-requirement-for-mrtrix/4371
All the best,
Nick