XtremeSystems.org has another review today of the Cool Link Cool U1Power2 and Cool U2Power HSF's.
Both of these heat sinks are massive even in comparison to the Volcano 7. The U2Power comes with an 80mm 5400rpm Y.S.Tech fan that blows 56CFM and seems a bit more quiet than a Delta of the same size. The U1Power2 boasts 2 fans, 60mm 7000rpm Y.S. Techs that blow 40CFM each and will keep your system running if one should ever quit.More information at XtremeSystems.org