The fan on the 10X Quiet is a 2-ball bearing unit rated at 1500rpm and 28dBA if connected directly to +12v power, with the included Fan Mate 2 allowing a range of 500-1400rpm and <26dBA to be manually adjusted by the user. This is a 0.25A fan, however Zalman does not give specifications on airflow. It attaches to the side of the tower via two clips that secure the mounting holes to grooves in the fins. The fan also features four rubber standoffs built in, one on each corner, to help reduce vibration from the motor. The top fin has been stamped with the Zalman name and CNPS10X model number and plated to produce a high shine. The ends of the heatpipes also feature a chrome plated cap for aesthetics.
The five U-shaped heatpipes as well as the base are left in their bare copper finish, although the bottom of the base has been polished to a mirror surface. The top half of the base is cast aluminum and is secured to the copper bottom via four screws. The heatpipes have been soldered to the base although it does appear this may not be quite as high quality a job as we've come to expect from Zalman, as there are possibly some gaps and droplets of solder visible along the edges where the heatpipes go into the base.
Now let's look at the 10X Extreme and see what differences and similarities there are.