My submerged pump running while the machine and radiator fans off will add 6C to the system and stay there. Since you are considering 24 hours and it never going up from there, that is not "a lot" of heat going into the system. The rad can easily dissipate that heat with little to no effect to my overall cooling. The only effects MAY be the different in the extreem overclock. But im not trying for that, so its ok.
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