it is compatible with ATI's 4870 and NVIDIA's 9800GTX+ graphics card as well as a host of other lower specification cards. The cooler features two U-shaped copper heatpipes which transfers heat from the GPU onto around 84 aluminium fins. Two large slim 100mm fans then direct airflow over the fins and down onto the main body of the graphics card, which keeps the whole card cool. Both fans can be controlled independently by a PCI fan controller that attaches to a spare PCI back plate. On minimum fan speed setting the Musashi is virtually silent, but if you require a little more cooling then just turn-up the fan speed to increase the thermal performance.