i have the Contac 29. i5-3570K @ 4.3GHz
Idle Temps - 28C lowest, 30C avg.
Load Temps - 68C avg. running Prime95
it's a decent cooler for the price and for light OC. but if you're going to overclock beyond 4.5GHz, better get something like the Noctua NH-D14 or Thermalright Silver Arrow.