geofelt :
To answer your question... Yes. a H60 will cool a 6700K.
But...
I think 14nm construction has rendered liquid cooling obsolete.
You will run out of tolerable vcore limits before you run out of thermal limits.
I was able to OC a 6600K to 4.8 with a simple downdraft noctua NH-l12 cooler, keeping stress tests under 70c.
You hardly need more.
Closed Looped Liquid Coolers (CLLC) such as the Hydro H60 are all about "cooling" the CPU, nothing to do with aesthetics. The second reason a person would by the H60 or any other CLLC would be for Noise Reduction. I despise whining sounds coming from my Box/Rig. The only sounds I want to hear are the Fans kicking in on my GTX 970 when it's under heavy load at 70 Celsius.
The newest generation Hydro H60 works beautifully on one of my builds with an FX8350 overclocked to 4.6GHz. It works fine with the Intel 6700 but I do not overclock that build, no reason to. Intel is a powerhouse without having to OC. IMO.