Is it possible that, in the process of installing the SSD, you moved a cable or something that might be coming into contact (ever so slightly) with a fan or other moving part?
Perhaps you can get a recording of this very quite noise and then run it through a tool to up the volume so you can hear it more clearly.
If it sound something like:“T Minus 12 days, 3 hours, 6 minutes 19 seconds and counting…” I would strongly suggest you ditch the drive ASAP and file a complaint with whomever you bought it as it is a TICKING TIME BOMB! RUN!!!