Sorry for bringing this up again. Looking to upgrade the 1TB Seagate ST31000528ASQ drive that came in my 2009 27" i7 iMac to a 2TB or 3TB drive. Any known good successes out there? A success would be when: 1. You used either the original temp cable that came with iMac or the LCD/Optical temp cables from applecomponents.com. 2. HDD fan working properly afterward, meaning that the HDD fan will ramp up when temperature goes up and back down again to about 1100 RPM when the temp goes down. I don't think that shorting the cable is an acceptable solution but if you know it works... Please let me know which HDD/temp cable you used as well as the hard drive. I'd also like a drive which is not too noisy, my stock seagate is nearly silent.