Hello, I bought a MacBook Pro 17" unibody last month, with the optional 7200 rpm hard drive. Everything worked fine, until recently when I noticed that every time I would do something "intensive" for the computer (e.g., using Handbrake to convert a video for my mobile phone) the hard drive would emit a constant high pitch whining noise. It's like a high frequency noise, and it's there for the whole duration of whatever I'm doing (e.g. if rendering files in iMovie takes 3 minutes then it will make that noise for 3 minutes). This is not a noise which I have to get my ear close to the keyboard to hear -- it's very much audible, and it's extremely annoying. Does anyone else have the same issue? Is this normal? It's very annoying given that the computer is not even one-month old. I have run the tests with the OS X disc, and it didn't show any problems. I think that I might have to take it in to my local Apple store, and it's a drag. Thanks for any input. A EDIT: I have run further tests and this is what I found. The high pitch noise only seems to occur when the MacBook Pro is set to Higher Performance graphics mode, not when it runs in the Better Battery Life mode. I wonder whether this is not a hard drive issue but something to do with the graphics chip that is used in the Higher Performance mode.