although a it is chucking the smae amount of heat out, there is only one source for the radiator where as previously u had the heatsinks on the Nb GPU CPU which would output heat at a much faster pace, because of the coolant the coolant needs to be heated first before the radiator gets hot but has theres so much of it it conducts across all of the coolant and the temps are much lower so the radiator is chucking out the same wattage of heat, but at a slower rate so your room temp will be cooler. also the water cooling is point cooling so the only heat is coming from the radiator whihc means it will take it longer to radiate around the room so the room will take long to heat up but since theres always airflow ijn a room and windows and things, the room wont heats up as much as its being cooled down at a constant rate.
i know that sounds confusing but it is true and you will see a room temp drop of a few degrees which can make a diffrence
