Dell POWEREDGE R720 User Manual
Page 7
Power Efficiency Comparison of the Dell PowerEdge R720 and HP ProLiant DL380p Gen8 Rack Servers
7
SPECpower_ssj2008 includes a measurement of power while the servers are at varying levels of target
utilization.
The performance-to-watt ratio at each target load level is total operations (ssj_ops) divided by
average power consumption of the server at that load level. Figure 2 shows power efficiency at each interval.
Figure 2: Performance per watt ratios for all target loads
2
Figure 2 also shows that the PowerEdge R720 has a higher power efficiency ratio at all target loads. When IT
professionals are sizing their data center needs, a target CPU utilization of 70% is often recommended to allow
extra capacity for load peaks. This makes that interval particularly relevant for evaluating power efficiency.
At the 70% target load interval, the R720’s ratio of 3,975 ssj_ops/watt gives it a 28% power efficiency
advantage over the ProLiant DL380p Gen8, with its ratio of 3,108.
2
Required SPEC disclosure information: R720 scores: (1,235,223 ssj_ops and 303W) @ 100% target load and 3,352 overall ssj_ops/watt vs.
DL380p Gen8: (1,217,238 ssj_ops and 324W) @ 100% and 2,861 overall ssj_ops/watt. Comparison based on results by Dell Labs June 2012.
SPEC® and the benchmark name SPECpower_ssj® are registered trademarks of the Standard Performance Evaluation Corporation. For
more information about SPECpower, see
4,072
4,214
4,210
3,975
3,787
3,491
3,009
2,601
1,947
1,080
3,752
3,539
3,319
3,108 3,010 3,026
2,797
2,415
1,784
949
0
500
1,000
1,500
2,000
2,500
3,000
3,500
4,000
4,500
100%
90%
80%
70%
60%
50%
40%
30%
20%
10%
SP
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ssj2
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ssj_o
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Target Load
SPECpower results
Performance to power ratio across load levels
(higher is better)
Dell PowerEdge R720
HP ProLiant DL380p Gen8