Thermal Performance of the i7 6700k

Solution
It will be fine running stock overclock under a decent size load. Any extra over clocking and you should upgrade to a dual wide radiator system (240/280 mm radiator).


Deepcool captain 360's good? It has a 360mm radiator.
 


If your case can fit it, then go for it. I run a 4790k at 4.8GHz on the 280mm H110i GTX from Corsair. NZXT also is a good company. I don't have any experience with Deepcool, but read some reviews or watch a YT video.