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Load Regulation, Hold-Up Time And Inrush Current
To learn more about our PSU tests and methodology, please check out How We Test Power Supply Units.
Primary Rails And 5VSB Load Regulation
Load Regulation testing is detailed here.
Hold-Up Time
Our hold-up time tests are described in detail here.
The holdup time was less than 16 milliseconds, which means the PSU failed this test.
Inrush Current
For details on our inrush current testing, please click here.
The registered inrush current is at normal levels for a PSU with a 550 W capacity.
Load Regulation And Efficiency Measurements
The first set of tests reveals the stability of the voltage rails and the PSU's efficiency. The applied load equals approximately 10 to 110 percent of the maximum load the supply can handle, in increments of 10 percentage points.
We conducted two additional tests. During the first, we stressed the two minor rails (5V and 3.3V) with a high load, while the load at +12V was only 0.10A. This test reveals whether a PSU is Haswell-ready. In the second test, we determined the maximum load the +12V rail could handle with minimal load on the minor rails.
| Test | 12V(A/V) | 5V(A/V) | 3.3V(A/V) | 5VSB(A/V) | PowerDC/AC(W) | Efficiency(%) | Fan Speed(RPM) | Fan NoisedB(A) | TempIn/Out(°C) | PF/AC(V) |
|---|---|---|---|---|---|---|---|---|---|---|
| 1 | 2.707A | 1.974A | 1.991A | 0.985A | 54.74 | 84.28 | 1005 | 37.4 | 38.94 | 0.953 |
| 12.253V | 5.062V | 3.310V | 5.069V | 64.95 | 41.98 | 115.1V | ||||
| 2 | 6.447A | 2.958A | 2.992A | 1.185A | 109.77 | 88.07 | 1005 | 37.4 | 39.60 | 0.964 |
| 12.241V | 5.058V | 3.306V | 5.058V | 124.64 | 43.01 | 115.1V | ||||
| 3 | 10.527A | 3.466A | 3.510A | 1.384A | 164.84 | 89.53 | 1065 | 37.6 | 39.93 | 0.978 |
| 12.230V | 5.055V | 3.302V | 5.046V | 184.11 | 43.68 | 115.1V | ||||
| 4 | 14.612A | 3.954A | 3.999A | 1.584A | 219.73 | 90.24 | 1065 | 37.6 | 40.71 | 0.985 |
| 12.222V | 5.052V | 3.299V | 5.034V | 243.50 | 46.46 | 115.1V | ||||
| 5 | 18.363A | 4.957A | 5.007A | 1.788A | 274.77W | 90.12 | 1065 | 37.6 | 40.82 | 0.989 |
| 12.214V | 5.047V | 3.294V | 5.020V | 304.88 | 46.96 | 115.1V | ||||
| 6 | 22.123A | 5.949A | 6.015A | 1.995A | 329.76 | 89.86 | 1080 | 38.3 | 41.21 | 0.991 |
| 12.204V | 5.042V | 3.290V | 5.007V | 366.96 | 47.87 | 115.1V | ||||
| 7 | 25.882A | 6.949A | 7.030A | 2.200A | 384.71 | 89.42 | 1127 | 39.6 | 42.87 | 0.992 |
| 12.195V | 5.036V | 3.285V | 4.994V | 430.25 | 50.42 | 115.1V | ||||
| 8 | 29.639A | 7.947A | 8.048A | 2.408A | 439.58 | 88.87 | 1165 | 41.1 | 43.27 | 0.993 |
| 12.187V | 5.031V | 3.280V | 4.980V | 494.66 | 51.99 | 115.1V | ||||
| 9 | 33.842A | 8.456A | 8.576A | 2.410A | 494.73 | 88.17 | 1190 | 42.9 | 44.12 | 0.993 |
| 12.178V | 5.028V | 3.276V | 4.975V | 561.14 | 54.05 | 115.1V | ||||
| 10 | 37.793A | 8.958A | 9.074A | 3.030A | 549.59 | 87.46 | 1245 | 45.5 | 45.13 | 0.994 |
| 12.169V | 5.024V | 3.273V | 4.946V | 628.41 | 56.13 | 115.1V | ||||
| 11 | 42.342A | 8.965A | 9.081A | 3.031A | 604.57 | 86.81 | 1285 | 46.1 | 45.52 | 0.994 |
| 12.160V | 5.021V | 3.270V | 4.943V | 696.45 | 58.07 | 115.1V | ||||
| CL1 | 0.099A | 13.014A | 13.005A | 0.000A | 109.41 | 82.83 | 1205 | 43.8 | 43.62 | 0.967 |
| 12.260V | 5.035V | 3.281V | 5.080V | 132.09 | 49.20 | 115.1V | ||||
| CL2 | 45.784A | 1.002A | 1.003A | 1.001A | 569.90 | 88.13 | 1240 | 45.2 | 45.14 | 0.994 |
| 12.155V | 5.040V | 3.292V | 5.039V | 646.68 | 55.90 | 115.1V |
Load regulation was tight on all of the rails except the 5VSB rail, where load regulation doesn't play an important role. On top of that, the PSU had no problem delivering its full power for prolonged periods of time at very high ambient temperatures. In addition, the fan's noise wasn't annoyingly high, even during the last two tests (100 percent load and 110 percent load), although we pushed the PSU to its limits. In the efficiency section, the PSU easily cleared the 80 Plus Gold requirements, even in our tough testing conditions. Overall, this is an excellent platform, and EVGA made the right choice to offer it at lower capacities.
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