
5
Table 2: Operating efficiencies of 80 PLUS certified HP CS power supplies
Percent of efficiency
Power supply type @ 10% load @ 20% load @ 50% load @ 100% load
HP 460W CS Gold 85.02% 90.39% 92.43% 91.57%
HP 460W CS Platinum 86.50% 91.20% 94.37% 93.91%
HP 460W CS Platinum Plus 88.58% 92.05% 94.42% 93.07%
HP 750W CS Gold 87.58% 90.58% 92.90% 91.54%
HP 750W CS Platinum 88.85% 92.04% 94.55% 93.67%
HP 750W CS Platinum Plus 89.37% 92.47% 94.69% 93.41%
HP 1200W CS Silver 78.43% 86.84% 91.75% 91.19%
HP 1200W CS Platinum 88.74% 92.53% 94.34% 93.21%
HP 1200W CS Platinum Plus 90.37% 93.24% 94.44% 91.92%
Note
Most common load point
Figure 2A: Efficiency curves for HP CS Platinum Plus power supplies
86.0%
88.0%
90.0%
92.0%
94.0%
96.0%
98.0%
0 200 400
600
800 1000
1200
Peak efficiency range
for 460W supply
Peak efficiency range
for 750W supply
Peak efficiency range
for 1200W supply
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