Sameer25 :
Compuser10165 :
I would pick the Cooler Master TX3 (it's actually below 20 right now), and it will perform better than the Zalman, I think.
will it be able to handle the 4.2ghz oc
I think so, it has a good and efficient design (direct copper heatpipe contact so it will do just right, even if larger more expensive coolers outperform it), just be sure that it is seated correctly and with correct thermal paste application (I prefer to spread the paste with a plastic card or so, and any irregularities will be solved when placing the heatsink). Be sure to check temps before and after OC to see the difference. Also, good case airflow always helps.