My computer makes a odd buzzing noise when chrome is open

This is indeed caused by frequently shutting down and waking up the CPU. It is supposed to be silent, but some aging systems will start to buzz especially when running on batteries, this is often due to coil noise in the VR (voltage regulation) circuit caused by loosened coils or dried up capacitors. Consequently the coils physically move slightly and you hear a tiny tick.

Why this only happens in Chrome is because it bumps system timer resolution from a default 50Hz to 1000Hz for the entire duration Chrome is running, that's what is causing the buzz (not to mention greatly reduced battery life). Applications must do it only when needed. I reported a bug a while ago, and for a short period it was resolved, but now it is back again (also see 153139).

On desktop systems the easiest workaround is to disable deep-sleep states (C1, C1E etc) in the BIOS. Laptop BIOSes usually don't provide such settings, for which I have made a workaround tool called nobuzz.

If it sounds like this high-pitched noise, you're hearing the not-so-soothing sounds of a bad capacitor or VRM on the MB or GPU. Look for any caps that are bulging or (for solid caps) appear "unseated."

It turned out oddly enough to be the power saving features of the board. I turned them all off in the bios. Its odd that they would only start working when chrome was open, not really sure why, but it worked. So for any of you that have this problem do this:

C1E and CPU EIST. Disabled them both in the bios and BAM! no more noise, silent computing.

Thhanks to the guys over here: http://www.tomshardware.com/forum/255148-30-turn-energy-saver and the other people's thread who i read (but i can't find the url for) that suggested this.

This is just a shot in the dark, but maybe for some reason (no idea why Chrome would do this, it shouldn't) Chrome is taking up a lot of proccessor power, in turn making your fan run faster. I know it isn't your fan making the problem (judging by your question), but what about some loose screws holding in the motherboard?