Decreasing PWM temps?

[known12345]

I have an ABIT IP35-E, a q6600, a p182, and a Arctic Freezer Pro 7 and I oc to 3.6 at 1.5v. When I ran prime95 and stress test at night, my coretemps were around 65-70C but my pwm temps (measured by my BIOS program) listed at 100C!!! I QUICKLY ended prime95 and tied one of my p182 fans to the top of my case facing towards the left of my cpu cooler and ran it on high (sorry for no pictures, in the process of taking pictures and posting them). After doing that, I checked my pwm temps and they dropped to 80C!

This is a picture of my motherboard from newegg.com:
http://www.newegg.com/Product/ShowI...Description=ABIT+IP35-E+ATX+Intel+Motherboard
http://www.newegg.com/Product/ShowI...Description=ABIT+IP35-E+ATX+Intel+Motherboard

And if you look toward the bottom left of the picture (underneath the cpu socket) there seems to be a blue heatsink that I think is cooling the pwm voltage regulators (?).

1)I think because I directed a fan towards the heatsink (though a few inches away, I was able to cool the voltage regulators. If this is the case, is there any way to cool this area more efficiently?

2) I will be getting a TRUE 120 soon so I hope it may also decrease my PWM temperatures but I am unsure if it will have any effect as it is specifically designed to cool the cpu, does anyone know if a TRUE 120 (or any cpu heatsink) will help to decrease PWM temperatures?

3) If I am wrong in my belief that the blue heatsink underneath the cpu socket helps to dissipate cpu temperatures, how exactly do I drop PWM temps?

4) Will getting a heatsink on the northbridge help to drop PWM temperatures? If not, what benefits does a better heatsink on the northbridge provide?

5) Also, what exactly is/are MOSFETS?