Practical cooling science project

Hello, I am currently doing a science project based on finding the ideal cooling system for a pc. I have already taken several preparations for this project, including:
1. studying several concepts such as thermodynamics and geometry, as well as other miscelaneous physics excerts.
2. Going around to different computer repair businesses in my area and questioning them about the about cooling systems.
3. Using sites explaining the cooling systems listed below in order to attain a good idea of how I would implement them for myself.

And now I have come to this site in search of info. Any advice or guides you can offer on any of the systems listed is of great help to me. Also, below the cooling systems list is my idea of the ideal cooling liquid to be used in submersion( and possibly water plating) systems. Thanks again for any tips you can offer.

The following cooling systems I will be testing include
1. stock system
2. liquid submersion
3. water plating/w and without specially designed motherboards
4. phase change cooling
5. thermo-electric cooling (peltier effect)
and hopefully (meaning I would die if I could get the chance to do this)
6. liquid nitrogen cooling

Ideal Liquid Coolant
1. does not conduct electricity
2. does not corrode metal or react with it
3. does not stick to metal surfaces
4. does not produce toxic fumes (being toxic is okay as long as it does not release fumes)
5. has a high heat capactiy
6. has a high thermal conductivity
7. has low turbulence when going through filter and radiator

[Moderator]

Mineral oil.

Is that safe, considering, its combustable?

[Moderator]

http://www.jtbaker.com/msds/englishhtml/m7700.htm

Computer submersed in mineral oil.

http://www.youtube.com/watch?v=PtufuXLvOok

How about using de-ionized water? We use it to keep electronics cool in the thrusters of some of our drill ships.

I'd be fine with using combustable substances if I could just find a way to seal off the liquid and the parts of the pc that will be submerged. Anyone know of a pratical way of doing this? Also, can someone give me a site that provides a deep guide on building a computer that can explain everything I will need to know when purchasing parts and assembling one. Thanks in advance!

[Moderator]

If you plan on submerging it what's the point of sealing off components ? ?
You're contradicting yourself here...