If you're an absolute beginner in watercooling, you should study some guides und general Information first!
Especially, there are some helpful Videos on YT, e.g.
https://www.google.de/#q=Guide+to+Water+Cooling&tbm=vid This is one which is nice made:
The Complete Beginners How Guide Watercool your PC - YouTube (in English language!)
If you can understand german, there is also a couple of Videos from the german reseller Caseking, where the Basic parts of an watercooling Loop ar explained:
Wasserkühlung Caseking - YouTube
These are the parts you always need:
- Pump
- Water Reservoir
- Water block for CPU and, if wanted, GPU too (in most cases, you don't need blocks for other components like Mainboard, RAM etc.)
- Radiator(s) with fans (Radiators can be mounted inside the case, if it's suited, and/or outside. The more/bigger you choose the radiators, the better is the cooling result!)
- Tubing
- Fittings (generally, you need two fittings for each part; therefore, for a simple loop only for CPU-cooling, you Need 8 fittings in total: two each for pump, reservoir, water block and Radiator. However, there are combinated offers with pump and reservor already built together, e.g. this one:
http://geizhals.at/eu/ek-water-blocks-ek-xres-140-d5-pwm-a1190087.html: for these ones, you need only 2 instead of 4 Fittings, namely in- and outlet)
- Coolant
There are some additional options like adjustment stuff etc., but these are not really necessary for a working cooling loop, more something like "luxury"
Greez N.