The 120x120x25mm NF-P12 fan at spins at 1300RPM by default. Optional in-line resistors can reduce fan speed from that level to 1100RPM or 900RPM if quieter operation is desired. A standard 3-pin motherboard header provides power. The nine blade fan ships without a fan grill. Looking at the top of the Noctua NH-C12P heatsink we see the six heatpipes threading through the widely spaced fins.

The Noctua NH-C12P heatsink stands about 114mm tall, but the bulk of it is elevated 45mm for clearance of adjacent capacitors, northbridge heatsinks, system memory etc. Even the heatpipes are bent to keep out of the way. The six 6mm diameter copper heat pipes expand from a 38mm wide arrangement at the base to 110mm wide spread through the fins. Also note how the base fins extend the full height of the cooler. Each nickel plated aluminum fin is roughly 126 x 44mm in size, and the leading and trailing edges have a rippled pattern. Tabs are cut into the fins for the wire fan clips to lock into. Each fin is 0.5mm thick and spaced 2.3mm from the next.

The base on the Noctua's NH-C12P heatsink measures 40x38mm in size. The copper portion of the base ranges from 2mm to 4.5mm thick. The six 6mm diameter copper heatpipes have been soldered between the aluminum and copper base plates. The base is very slightly concave in the axis perpendicular to the heatpipes, and convex in the direction they run.