it comes from the left speaker area, like a noisy choke (not a buzz, but a high pitched, quiet whine), and seems to change frequency/pitch with certain cpu or I/O operations. Nothing seems to be in this area (looked at the fixit teardown), and as noted, everything on this is solid state - no HD noise to blame it on. Its not the fan. Seems to be more noticeable with graphics intensive activity perhaps. It isn't there all the time, only pops up on occasion. Anyone else noticing this that has a similar mbp?