When I first received my Tennmax Detonator cooler I was a bit surprised at its small size. how could such a small little heatsink and fan combo cool down my super hot G400 video card? At first glance the heatsink looks very professionally made. The heatsink consisted of layers of stamped metal. I was informed by TennMax that the cooler is designed to dissipate 17 Watts of heat. A typical TNT-2 Ultra chipset produces 10 watts, which shows the heatsink is a good margin for performance upgrade.