Zalman have done an amazing job with the CNPS9900 NT. It is based on the award winning CNPS9900 LED, but also adds the possibility to run it at lower RPM, thanks to the included adapter. It is a near perfect CPU cooler; performance is amazing, it is silent, it looks great, it has a green LED fan, its easy to install and has support for many sockets. The only problem with it is its somewhat high price tag, but some other low noise & high performance coolers cost just as much.
The CNPS9900 NT has a very simplistic installation design which uses a few included clips and screws. The fan is silent when set at a low setting and only slightly louder once the PWM kicks the fan into high. A small bottle of thermal grease is included with the cooler which has a brush head, easing the application of the grease. Performance of the cooler is simply amazing. It manages to keep up with the massive Cooler Master V10, but comes at humane dimensions and a smaller price tag.
Zalman should be commended on the CNPS 9900 NT as it is a fantastic addition to the CNPS series. While the CNPS9900 LED is already a great cooler it is good to see that Zalman has added the option to run the cooler even quieter while keeping the temperatures at great, low levels with the 9900 NT. Those who do not dig the dark grey look or green fan, should take a look at the CNPS9900A LED, which has the same specifications and features as the NT, but ships in the normal golden brown copper color and blue LED fan.
The CNPS 9900 NT meets its requirement as a high performing, silent cooler, and it would be a great addition to any case. Basically, if you can get one cheap you shouldn't have to think twice.