Hardwarecanucks posted a review on the Silverstone Nitrogon NT06 CPU Cooler.

The Silverstone NT06 did manage to provide a slight improvement to cooling temperatures over the Arctic Cooling 7 Pro, and the results of the orientation testing suggest those results would have been better if it had been tested in a tower case. On the other hand, the inclusion of a sub-par thermal compound, the difficult mounting on S775 motherboards, clearance issues, and the Price / Performance ratio leave us wishing there was something more to this cooler.

Silverstone Nitrogon NT06 CPU Cooler Review