I have doen a lot of googling and searching about this, so please excuse if i have missed the answer. I have just replaced the standard 80GB HDD with a sandisk Extreme 120GB SSD. I caddied up the ssd and used super duper to clone the internal hdd across then swap them over. All went well, the mac mini boots up real quick now. The issue is, the drive is buzzing or whirring. I know its the drive because, when i run blackmagic disk speed test, the noise is instantly louder with the read/write of the drive. I didnt notice any noise when it was caddied though! I have contacted the place i bought it and they have issues an RMA. My concern is though, that if they caddy it and there is no noise, i get charged to return it to them and back to me, and then the drive is no longer a bargain! Im just about to remove the drive and put a 250Gb WD in there to fully test it out, and re caddy the SSD. Any suggestions or ideas from the forum? Thanks in advance. Clarkee.