NZXT Kraken X41/X61 for i5 6600K OCed?

[zhenbang95]

I'm building a new gaming PC with an i5 6600K and was thinking of using the NZXT Kraken series for watercooling. I will probably be overclocking the i5 to 4.6GHz. Is the X61 overkill? Should I just go for X41? Any help is much appreciated.

 

[profoundnoah]

I'd recommend the x61 as you'd get more overclocking headroom from it.