Thermalright Royal Knight 120 CPU Cooler, 6 Heat Pipes Heatsink CPU Cooling, Dual 12cm PWM Fans, for. [CPU Cooling] The CPU cooler is a double-tower and dual-fan cooler, which adopts an anodic frosted top cover + fully electroplated 6 heat pipes and seiko micro-carved reflow soldering copper bottom process, combined with a 12cm high-performance blackened fan, which can give full play to the heat dissipation effect of the CPU cooler stably.