so i noticed i can get a Corsair H60 bundled with an i5-2500k. im not sure if i would even get liquid cooling, im happy with buying a 3rd party fan (Hyper 212+) but i just wanna learn about liquid cooling.
i looked up videos on how to install, but it all seemed too simple lol. is the liquid already inside the radiator and whatnot? is it something i have to add, is it something id have to replenish after awhile? if so how often does it have to be done? does it still use thermal paste? all these question and any more info you can provide me would be great. also if i would ever pursue liquid cooling, it would just be for my CPU and none of the other stuff.
thanks all 
The most basic description of water cooling is the cpu heats up the water, which travels a down a tube to a radiator that a fan is blowing air through, then returns to the cpu to repeat the process. Actually it would be more accurate to say that the heat travels through this system rather than the heated water because there is water throughout the whole system. The two biggest advantages are that they are quiet(one less intake fan to pull air in), and cpu's are usually able to be overclocked further because water heats up slower the metal heatsinks in air cooling. The two biggest disadvantages are that the cpu temps will never be less that room temperature, and the possibilities of leaks(it is water after all.) With an all-in-one solution like the one that you mention, you don't replace the water/anti-biological mixture at all(you couldn't anyway)s. You might need to replace the mixture with a custom built system, but that is a real pain(understatement of the century). As for thermal paste, yes it is needed just as much for liquid cooling. While you need one less intake fan, proper air flow is still essential. The air needs a clear path through the case and through the radiator fan. Here is a link that details more abouth liquid cooling, please be sure to read the whole article(it is three pages long):
http://www.maximumpc...and_constructedOn one final note, the custom built water cooling solutions can be built to include the graphics cards.