Our evaluation of the Noctua NH-D15 CPU air cooler is now online for your viewing pleasure. If you need a new cooler for your burning hot processor, I highly recommend reading this review. The Noctua NH-D15 is firmly footed in the excellent performance of the NH-D14 model. The NH-D15 is not a "new" air cooling technology but rather an evolution of the old. The new claim to fame with this heatsink unit is that it has an expanded heatpipe layout, plus some other bells and whistles that Noctua hopes make it king of the hill.