OCC has published a review on the Noctua NH-C12P SE14

The NH-C12P SE 14 is another solid offering from Noctua. When it was compared to the other high-end heatsinks tested, it performed well by comparison, falling between the NH-U9B SE2 and the Thermalright TRUE. This is an accomplishment in itself, because when overclocked, the temperature differential between the NH-C12P SE14 and the TRUE was only four degrees Celsius.

Noctua NH-C12P SE14 Review