Multiple Save Buttons after Editing Information

I keep going back and forth on this issue and wanted to get some other opinions.

We have a series of pages within a settings control panel. There are multiple modules within the pages, and each module can be saved independently.

Should the "SAVE" button on each module appear:

  1. Always appear enabled (right side of image)
  2. Only appear enabled when a change has been made (left + right images)
  3. Some other variant, such as not appearing until there is a change made (walked away from this idea)

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