Good day everyone: I just replaced my 2011 iMac's (21.5') hard disk yesterday. it was 500 GB, I put 2TB western digital, but the fan went too high in speed and it is noisy now. now I want to take the 2 TB out and put back the 500GB, but before I do that will the 1TB do the same? will it make high speed fan and noise as well? I am waiting for your answer before I take an action. thank you in advance.