Okay as the title suggests I'm a noob when it comes to water cooling, I haven't even played around with a AIO kit before. I have a few questions but first a bit of info to get out of the way. First specs: CPU- i7 2600K currently at 4.6 w/1.345V hope to go higher with water GPUs- EVGA 670 FTW sli @1267-1280/7200 case- Cooler Master HAF922 Okay so far I have decided that I wnt to use EK blocks for the GUPs and the CPU these are what I have picked out, two EK GeForce 680 GTX+ VGA Liquid Cooling Block - Acetal + Nickel CSQ , I will be conection the two GPU blocks with a 3 slot two way EK bridge and this EK Supremacy Universal CPU Liquid Cooling Block - Acetal + Nickel . I'm also getting the EK 680 backplate but that's purely for aesthetic. Now my first question is, what diameter tubing should I run 3/8 x 5/8 or 1/2 x 3/4, and what brand? I need to know this so I can get the proper compression fittings. Next I am unsure of how much radiator I will need? I technically have enough space and mounting area for 480mm total rad space ( would be two 120's and on 240) but that would end up being a mess of tubing. One 120 and one 240 would be ideal, but I could always add an external 360-480 radiator. Again I have no idea how much I need. And lastly for now should I go with a separate pump and reservoir, or a combined unit like this or this? Thanks in advance for the help.