You guys need to check your installation because it is not normal to get these chirp sounds or coil sounds on your computer. You sure its not the HDD that makes these sounds? Well sometimes you will hear clicks but that is normal because OS X is reading the disk.
My power management is fine:
As for my SSDT, I attached it here but you cannot use it. You need to create your own.
I haven't added this information either in my guide (at one point I will) but all you have to go is add your Intel HD Graphics information under GFX0 in your DSDT. Basically you use a DSM method in there.
Well coil whine is "normal" if there is too much power load on coils, i.e. bad power management
And i'm pretty sure its not my HDD cos i dont have a HDD
I do use SSDT though
In early macbooks, the coil noise was present and could be removed by a work around by disabling C4 state, but that decreased battery life so it was never an ideal workaround. People made apps such as ShhMBP to remove the noise, but all those apps had side effects. I wonder if its worth trying those apps out
This sound existed prior to frame buffer, so i doubt its the culprit, try different resolutions i have a feeling a single link lane on x1 width is just to much stress on the gfx........
example in linux i'm using a single link with x4 width ,but that config don't work under framebuffer.
This is Close to some power issue,like frequency voltage or something
For now check temps make sure nothing is over heating as this happens when the gfx receives a work load whether small or big.
are you saying using a dual link fb instead of single link could possibly help ?