For testing the power supply we used the load pattern listed below. If you add all the power listed for each test, you may find a different value than what is posted under “Total” below. Since each output can vary slightly (e.g., the +5 V output working at 5.10 V), the actual total amount of power being delivered is slightly different than the calculated value. On the “Total” row we are using the real amount of power being delivered, as measured by our load tester.
This time we tested the power supply at 25º C. We did like this because the power adapter is located outside the case and also a 65 W power supply does not produce a lot of heat.
Input | |
+12V1 | 2 A (24 W) |
+12V2 | 1.8 A (21.6 W) |
+5V | 1 A (5 W) |
+3.3 V | 1 A (3.3 W) |
+5VSB | 1 A (5 W) |
-12 V | 0.5 A (6 W) |
Total | 62.6 W |
% Max Load | 96.3% |
Room Temp. | 25.8º C |
PSU Temp. | 26.0º C |
Voltage Stability | Pass |
Ripple and Noise | Failed on -12 V |
AC Power | 77.7 W |
Efficiency | 80.6% |
AC Voltage | 114.1 V |
Power Factor | 0.594 |
Final Result | Pass |
The power supply included with Antec ISK300-65 can really deliver 65 W. Efficiency is not spectacular, but is above 80%. All voltages were very stable and close to their nominal values. Ripple and noise were below the maximum allowed all the time, except on -12 V, which was at 178.8 mV (the maximum allowed is 120 mV).
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Figure 13: -12 V output with the power supply delivering 62.6 W (178.8 mV).
Below you can see the outputs during our test. As we always point out, the limits are 120 mV for +12 V and 50 mV for +5 V and +3.3 V and all numbers are peak-to-peak figures.
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Figure 14: +12V1 input from our load tester with the power supply delivering 62.6 W (35.4 mV).
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Figure 15: +12V2 input from our load tester with the power supply delivering 62.6 W (40.6 mV).
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Figure 16: +5 V output with the power supply delivering 62.6 W (14.0 mV).
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Figure 17: +3.3 V output with the power supply delivering 62.6 W (12.4 mV).
