Vengeance replied: "Liquid cooling is becoming more and more a mainstream technology - originally used (and still is today) used to cool overclocked parts, it essentially consists of several parts: a sump (the tank that holds the coolant) the pump (the part that pushes the coolant through the system) the heat sinks (the part that cools a cpu, gpu, etc) the heat exchanger (or radiator, works the same way as a car radiator) the tubing various fittings (compression fittings are my personal favorite) The basic idea behind liquid cooling is to replace the fan over a cpu or gpu with a heat sink through which the coolant is pumped effectively whisking away the heat where it will go to the radiator and through heat fins and usually a large fan or two be cooled to return to the sump to go through the pump and make the trip again. It generally will get you about 10-20C cooler than high-powered air cooling. It has it's drawbacks: 1. It's expensive. A decent sized sump, pump and piping set up for multiple cards and a cpu can set you back $500 or more. There are multiple types of coolant on the market - the better ones are NOT made of water, but usually involve a glycol mixture similar to anti-freeze. 2. It generally voids the warranty on all parts you install it on. So if you break it, you bought it - er, rather gotta buy a new one. 3. It requires maintenance. The coolant must be kept at manufacturer set levels. 4. It's time consuming to set up and tear down. It'll take from an hour to a day just to get the piping set up depending on your set-up. It needs a wet run outside the box to check for manufacturer leaks and then a drain and a full install into your system. Once installed you have to work the liquid through the tubing very carefully (usually involves a syringe) so as not to trap *any* air bubbles. As far as draining goes - it's not really that bad - you open the fill port and drain from the lowest point, then make sure you tilt to get it out of the radiator. Don't spill - even though cooling liquids aren't conductive- spilling is never a good thing. There's a decent video here on draining your system: But for all the bad things being said about it here - it's second only to complete oil submersion as a cooling system. It's just generally not for people who don't want to overclock, crossfire high heat video cards or are not running the newest Qi7 processors that run *very* hot right out the box. And for most people the price tag can be very prohibitive. We build quite a few of them, our customers are mostly hardcore and professional gamers."

the pedestrian replied: "first of all every electric machine generate heat, now some processors need to generate some heat for optimal performance and if you cool them down too far then performance will be bad and erratic some time ago a computer manufacturer was developing a laptop that used a heat exchange system behind the screen, using oil for thermal exchange from the processor to the back of the screen where the oil was cooled and back but can't remember the name there was no cooling fan and it worked caind of like the new refrigerators cooling units"

william y replied: "at first you see bubbles, but then they go away. Sad huh. Anyway, you could get UV or light reactant coolant and install cold cathode lights, then the coolant will glow. Maybe you could buy some colored additive or something..."