Bro, have you fixed any fan on the Noctua NC-U6?
If not, then, you see that the PC-Cooler NB-400 CU fixed with a 40MM fan right?
So, the PC-Cooler NB-400 CU needs a fan to cool it out, to 46.2 degrees while the NC-U6 is able to cool you're chipset to 46.5 degrees without a fan attached to it...
If my assumptions is right, then clearly that the NC-U6 is the winner loo...
I'm still searching for the right fan to fit on the NC-U6...
And i believe after i put a fan on the NC-U6, then the NC-U6 is able to cool down my chipset more...
About the mounting pressure, yes, it is a bit scary, so hard to push, but that's a great thing too, as this will put a good pressure to the chipset, leaving no free way for the NC-U6 to move around.
Another thing about the fins, i've just calculated the amount of fins, yes, only 28fins is on my NC-U6 too!!!
Damn, why does noctua states that there is 29fins?
