Dell PowerEdge R820 Manuel d'utilisateur télécharger pdf (Page 17)

A Principled Technologies test report 17

Performance and TCO: Dell PowerEdge R820 vs.

HP ProLiant DL585 G7

Power utilization

Dell PowerEdge R820 solution

HP ProLiant DL585 G7solution

Power usage per server (watts-active)

557.8

1,064.0

Power usage per server (watts-idle)

248.1

607.0

Figure 11: Power utilization numbers, in watts, for each solution. Lower numbers are better.

 We estimate energy costs using active power for that percentage of time and the idle power measurement

for the remaining time. We assume a power rate of 9.88 cents per KWH.

Figure 12 shows our estimate of energy costs for power and cooling for the two solutions each year.

Energy costs

Dell PowerEdge R820 solution

HP ProLiant DL585 G7 solution

Annual

$507

$1,248

Three year

$1,521

$3,744

Figure 12: Energy costs for each solution. Lower numbers are better.

Source: Average commercial price for January 2012 at http://www.eia.gov/electricity/monthly/index.cfm (report epmxlfile5_6_b.xls)--Average

commercial price for Jan. 2012

Administrative costs

 We assume one FTE administrator can manage 44 servers. We estimate a burdened administrator salary of

$102,411.35 based on an administrator salary of $72,200 and a burden rate of 44.04 percent.

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Dell PowerEdge R820 Manuel d'utilisateur Page 17