On the overclocked i7, the results become a lot more interesting and more varied as well. Starting with the stock configuration, the H50 performs admirably even outperforming the Prolimatech Megahalem. However, changing the thermal paste (as we did with the ECO as well), we see another drop in cooling performance. This goes to show that the Shin-Etsu compound that comes pre-applied is excellent and should not be changed. One observation was that the radiator got warm to the touch during operation suggesting that the pump and water were transferring heat efficiently but was not being dissipated fast enough by the one fan on the radiator. So two fans were installed in both the intake and exhaust configuration. The decrease in temperature was very impressive compared to the gains a push/pull setup had on the CoolIT ECO. With two Coolink fans, the H50's performance was comparable to the Thermalright Ultra Extreme. Idle temperatures were also brilliant, reflecting the results we saw at stock speed.
The chart has been updated with the CoolIT ECO A.L.C intake configuration results.