Seasonic G-550 Power Supply Review
Overload Tests
Contents
Below you can see the maximum we could pull from this power supply. The objective of this test is to see if the power supply has its protection circuits working properly. This unit passed this test, since it shut down when we tried to pull more than what is listed below. In fact, we tried to pull 0.5 A from the -12 V output, to make this review comparable to the other power supply reviews we’ve published, and the power supply would shut down. This is the first time we’ve seen a power supply with a tight protection configuration on its -12 V output. During this test, noise and ripple levels stayed close to the numbers we’ve seen during test five. All outputs were still inside 3% of their nominal values.
| Input | Overload Test |
| +12VA | 21 A (252 W) |
| +12VB | 21 A (252 W) |
| +5 V | 11 A (55 W) |
| +3.3 V | 8 A (26.4 W) |
| +5VSB | 3 A (15 W) |
| -12 V | 0.3 A (3.6 W) |
| Total | 609.4 W |
| % Max Load | 110.8% |
| Room Temp. | 48.4° C |
| PSU Temp. | 49.0° C |
| AC Power | 706.0 W |
| Efficiency | 86.3% |
| AC Voltage | 111.3 V |
| Power Factor | 0.998 |