Bearing close resemblance to the Prolimatech Megahalems Frostytech tested a few years back, the Eclipse IV heatsink is a bifurcated-tower cooler from heatsink manufacturer 'X2 Products' a brand offshoot of Spire Corp. The Eclipse IV heatsink is rated to a maximum cooling capacity of 220W by its makers and at first glance has the gravitas to back that claim up.