I installed this drive and the first thing I noticed is it is actually quieter and cooler than the 1TB 7200 seagate. Quieter and it actually runs cooler as well by about 8-10 degrees. Right now it is at 89.6(F) This is cooler quieter and it is much much faster, especially where it counts which is random accessing of data and multitasking. Drive access sound is much lower and at a more subdued frequency. Amazing how freaking quiet these Mac Pro systems dead freaking silent. I suspect the small size and the Icepak with its dampening gasket between the little drive and the outer heatsink is what does a big trick.