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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
Efficiency
Power
460W Platinum Plus
750W Platinum Plus
1200W Platinum Plus
Peak efficiencyrange
for 460W supply
Peak efficiencyrange
for 750W supply
Peak efficiencyrange
for 1200W supply