Liquid Cooling Differences?

[Bmacker]

I'm looking to get my first liquid cooled build next month. The case I purchased supports up to 280mm radiators, but I've heard something whistled around saying you need to watch the watts displaced by radiators in specific builds.

The two liquid coolers I'm looking at are obviously the NZXT Kraken X52 and X62 (when they release in a few weeks). Can someone help me decide what's a better purchase and why? The difference is only $10.

My Build:
-EVGA 980Ti FTW
-i7-6700K OC 4.3 Ghz
-MSI Gaming Z170A XPOWER GAMING TITANIUM
-EVGA G2 SuperNOVA 750W
-16GB DDR4 Corsair Dominator Platinum
-NZXT S340 Elite Matt White

(For the record, I'm expanding GPUs in the future. The PSU is for future proofing what I plan on doing).

 

[getochkn]

The 52 is a 240mm, the 62 is 280mm. That is the only difference.

 

[Bmacker]

The 52 is a 240mm, the 62 is 280mm. That is the only difference.

Can you elaborate on why I hear "watts displaced by the radiator" as a common watch point when I see people choosing liquid coolers?

 

[Mikel_4]

The 52 is a 240mm, the 62 is 280mm. That is the only difference.

Can you elaborate on why I hear "watts displaced by the radiator" as a common watch point when I see people choosing liquid coolers?

Watt is CPU or GPU Thermal Design Power, so a claimed ### watt heat dumping ability refer back to the watt amount of source TDP. That's why the wider the surface of radiator's core, the more chance that heat will be absorb from the blown/sucked air, for example: a 120 mm radiator is dissipating 10 deg celsius away in every 1 liter per minute coolant flow from the outlet port while CPU water block outlet port is flowing out 60 deg celsius, by this we get 50 deg celcius coolant coming to the water block inlet port and mix with the 70 deg celsius temperature of the waterblock heat plate.
You know that electric energy used by CPU or GPU is transformed to heat energy, for example Titan X Pascal has 250W TDP at 90 deg celsius throttle limit, and a claimed maximum 250 watt heat dumping radiator at 1 gallon per minute flow rate, this make 250 watt electric energy is generating 90 deg celsius heat, the coolant will absorb the generated heat and the blown/sucked air will absorb the mixed heat.