I have an late 2009 21.5 imac. It came with the Western Digital 1TB Black. hard drive. I am looking to upgrade it to 2tb. I went out and bought the 2tb Black 64meg cashe. I got the Loud fan from this upgrade!! What Hard drive can I use to upgrade to 2tb without getting the full speed fan? I do also have the temp sensor for hitatchi, plus the sensor that came with the mac for the Western Digital. Thanks in advance for your help.