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This is a game from 2003 so any halfway modern PC should be able to run it really fast. My laptop is from 2005 and has no problems. Only the loading screens and the autosave take an annoyingly long time.
You can set the autosave to happen only on longer intervals, like every 12 months instead of every 2 or 5. If your game runs stable enough that you don't fear crashes, that's what I would do.