sharantk :
Hey I'm looking for a liquid cooler for 6600K. I want to overclock this one in future. Please consider Corsair I think it is more quite than others.
If you really want AIO cooling, you can get Corsair h100 or h110i gtx if your case can support it. An alternative to H110i gtx/v2 is the NZXT Kraken X61. If you're looking for smaller rads like 120mm, you can consider Corsair H80i V2 or H75.
I personally use H110i GTX with my 6600K and OCing at 4.7ghz with peak temp of 67C (with ambient temp of 20C) during prime95 small FFTs stress testing. The fans are quite loud though, i run them at around 1080rpm and its pretty loud. If you use quiet mode, it'll stay quiet but as soon as it gets warmer, it will get significantly louder. I keep mine pretty high because I use it as intake and trying to keep positive pressure in my case(NZXT S340).