212 evo push pull setup question

[pez1975]

i want to add another fan to the evo what the best option for me to cool this rig to enough for 4.5 on my 3570

3570 ivy bridge want @4.5ghz
asrock z77 extreem 4
8 gig ddr3 1600 ripjaws
OCZ Vertex 4 SSD
sli 660 ti's
rosewill challeger
1000 watt psu 80 gold

 

[Durvelle27]

is it a k cpu

 

[pez1975]

yes its a k

 

[T_Yamamoto]

the generic Cooler master fan that they (coolermaster) sells as the duplicate