The Viking cluster within LeSC is the first phase of a £2M investment to support applied computational scientists across Imperial College. Its primary users will be the Bioinformatics, High Energy Physics and Computational Engineering communities within the College These application communities are characterised by their high throughput and high performance computing needs. Viking has undergone several rounds of hardware upgrades since its intallation. May 2002 64 dual 2GHz P4 (XEON), 2GB RAM, Myrinet interconnect 32 dual 2GHz P4 (XEON), 2GB RAM, Fast Ethernet 32 dual 2GHz P4 (XEON), 1GB RAM, Fast Ethernet May 2003 64 dual 2.8GHz P4, 2GB RAM, Myrinet interconnect 64 dual 2.8GHz P4, 2GB RAM, Fast Ethernet The cluster uses a specialised Redhat Linux distribution and the nodes are accessed through Sun Grid Engine on hardware provided by Compusys.