“Coil whine results from faulty or low-quality coils or capacitors on the motherboard. These inappropriately resonate at different power levels. Sometimes this can be fixed by applying glue to the noisy component, but it's preferable for laptop manufacturers to make sure they're not using cheap and low quality components in the first place. Many laptop manufacturers will tell you this is Intel's problem and a result of SpeedStep. That is a deceptive statement. The truth is that SpeedStep requires higher quality coils and capacitors, and the truth is the laptop manufacturer was too cheap or negligent to use them. Most laptop manufacturers had major problems with coil when in their first Core Duo machines. Some learned their lesson and started using the appropriate quality of components. Others, six years later, don't seem to understand yet.”