The vertical 120mm fan spins at 800-2200RPM and draws power from a 4-pin PWM motherboard fan header. The fan is held on with two wire clips and rests against vibration absorbing rubber pads. With the vertical fan removed the five 8mm diameter copper heatpipes rising up through the 106mm tall aluminum fin stack are clearly visible. Each aluminum fin here measures 0.4mm thick and is spaced ~2.5mm apart. Clearance below the bottom-most aluminum fin is 46mm.

The horizontal 140mm PWM fan spins at 700-1800RPM. The fan is loosely held on with two wire clips and rests against vibration absorbing rubber pads as well. The horizontal aluminum fin stack is about 104mm long, 130mm across. Each aluminum fin here measures 0.4mm thick and is spaced ~2.5mm apart. Clearance below the bend in the copper heatpipes is ~49mm.

The five copper heatpipes are soldered to a 6mm thick copper base block and capped off with a 7mm thick aluminum section that provides support for clamping. Much of the heatsink is elevated 45-49mm above the CPU - while it's 225mm long, there's good clearance for board mounted devices.

Looking at the Titan Siberia TTC-NC55TZRB heatsink from the top we can see the 140mm fan head on. The edges of the stamped aluminum fins are jagged to break up airflow. The base of the heatsink measures 40x45mm in size. The five 8mm diameter heatpipes are spaced side-by-side.