Market research leader TNS conducted a total cost of ownership (TCO) study for HP to determine how its BladeSystem c-Class offering compared with rack-based offerings from Sun Microsystems. While past comparisons between blade and rack-based server solutions have suggested the cost-efficiency of blades, the advent of more power efficient processors has caused some to question this premise. This white paper re-examines the issues around rack-vs.-blade TCO in the context of recent changes on th...