Owls Nest) but it's always in heavy use by others around the university and so we're always scrapping for resources. So we built our own cluster. First we built a testbed cluster by lashing together a handful of surplus PCs and then we used that to spec out a formal HPC cluster that we paid about $27k for out of a grant.
The cluster is pretty awesome. Our student, Devin Trejo, put together a very comprehensive blog post on how the cluster was designed and built. You can read all about it here.