My lil friends are glowingdefinitely not "coil whine" or any type of fan noise. i would agree with the others that it is an alarm signal from the motherboard.
try running Windows Memory Diagnostic and/or MEMTEST and see what, if any, errors are reported.
what do you think the glowing thing directly above your CPU blowing out of the top of the case is?
The Windows Memory Diagnostic tested the computer's memory and detected no errors