Watercooling 120mm or 240mm?

[Makmarian]

Im going to buy a gaming pc soon, and my local store dont offer 240mm (only 120mm) in the build they sell.
(They sell builds where you can change some of the parts but not everything)
Note: I have never build a pc before, so i dont know how to install the watercooling system.
Anyways, should i buy the pc with the stock cooling and buy the 240mm later on (when i know how to install it), or should i just buy the pc with the 120mm?

Case im going to use "Corsair Graphite 760T"

 

[rubix_1011]

Closed loop liquid coolers are pretty simple to install. You'll have to remove the motherboard to install the backplate (if it is designed with one) but it is very much similar to installing a new CPU heatsink...you just have to also mount the radiator in a location that works for you.

Just a note - don't expect a closed loop 120 or 240 cooler to perform like custom watercooling, expect results closer to good air coolers.