If you use the cluster for research that is published or presented in a talk or poster form you MUST acknowledge the USDOE for the grant that made the system possible. In addition please send Brett a note with the reference.

An appropriate reference might be:

The calculations in this work were performed [in part] on an AMD Athlon cluster made possible by a grant from the United States Department of Energy.

Our Thanks to the DOE for making this research possible!!!