I’m not sure I understand. Whatever machine is hosting the Immich server will be doing all the processing. Uploading to there will go as fast as your internet connection/storage speed can go, and ML processing will be based on the processing power of the server. You can also manage the ML tasks if you want (Administration > Jobs and/or Settings).

The first big import will always take time if you have a lot of photos, as will the associated machine learning processing. I’d say you don’t need a GPU like that for normal use though.