Servers: Database consolidation on Dell PowerEdge R810 servers27Power savingsWe measured power to the test servers and storage when idle andwhile running the benchmark under peak load. We measuredenergy usage of the HP StorageWorks MSA30 with both a fullenclosure and a half enclosure and use the full enclosure results forthis ROI analysis. We averaged the idle and peak load results toestimate a power usage under typical load for the testconfigurations. We then calculated solution totals for the DellPowerEdge R810 solution and the 24 HP ProLiant DL385 solutionsthat we compare in this ROI analysis. Figure 11 shows our results.02,0004,0006,0008,00010,00012,00024 HP ProLiantDL385 solutions1 Dell PowerEdgeR810 solutionWattsTypical power usage: 24 HP ProLiant DL385 solutionsvs. 1 Dell PowerEdge R810 solutionFigure 11: Estimated power usage under typical load for the single Dell PowerEdgeR810 solution and 24 HP ProLiant DL385 solutions. Typical power is the average ofidle power and power under load. Lower results are better.3-year cost savingsWe estimated acquisition costs and ongoing operating costs for thetwo solutions over a 3-year period. In this analysis, the DellPowerEdge R810 solution delivered payback within the first year,offsetting its acquisition costs by major savings in operating costsand delivered a significant ROI over 3 years.