EVGA 750 B3 PSU Review

Load Regulation, Hold-Up Time & Inrush Current

To learn more about our PSU tests and methodology, please check out How We Test Power Supply Units. 

Loading...

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 hold-up time we measure is pretty long, and the 750 B3's power-good signal is accurate.

Inrush Current

For details on our inrush current testing, please click here.

The inrush current is at normal levels with 115V input, but it's quite high at 230V.

Load Regulation And Efficiency Measurements

The first set of tests reveals the stability of the voltage rails and the 750 B3's efficiency. The applied load equals (approximately) 10 to 110 percent of the PSU's maximum load 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 0.1A. This test reveals whether a PSU is compatible with Intel's C6/C7 sleep states or not. In the second test, we determined the maximum load the +12V rail could handle with minimal load on the minor rails.

Test #12V5V3.3V5VSBDC/AC (Watts)EfficiencyFan Speed
PSU Noise
Temps (In/Out)PF/AC Volts
14.385A1.984A1.984A0.985A74.76778.388%0 RPM
<6.0 dB(A)
42.57°C0.956
12.127V5.050V3.320V5.060V95.38138.14°C115.19V
29.808A2.971A2.981A1.188A149.73782.908%1180 RPM26.7 dB(A)40.01°C0.982
12.120V5.044V3.317V5.042V180.60744.56°C115.19V
315.583A3.479A3.496A1.391A224.87985.474%1218 RPM27.3 dB(A)40.19°C0.989
12.114V5.039V3.314V5.025V263.09644.85°C115.20V
421.355A3.977A3.983A1.595A299.74086.755%1240 RPM27.8 dB(A)40.40°C0.992
12.107V5.035V3.311V5.005V345.50345.39°C115.19V
526.802A4.974A4.986A1.803A374.72186.934%1315 RPM30.4 dB(A)40.85°C0.994
12.097V5.030V3.307V4.985V431.04146.07°C115.19V
632.255A5.975A5.991A2.010A449.62186.672%1425 RPM32.3 dB(A)41.39°C0.995
12.086V5.024V3.303V4.965V518.76246.64°C115.19V
737.723A6.982A6.996A2.222A524.62086.079%1518 RPM35.4 dB(A)42.14°C0.996
12.075V5.019V3.300V4.944V609.46447.49°C115.22V
843.204A7.984A8.010A2.435A599.52385.391%1645 RPM37.4 dB(A)42.86°C0.996
12.062V5.012V3.295V4.923V702.09148.44°C115.19V
949.128A8.487A8.535A2.440A674.58184.523%1796 RPM41.4 dB(A)44.65°C0.996
12.050V5.009V3.292V4.910V798.10150.49°C115.19V
1054.814A9.002A9.050A3.078A749.45883.619%1910 RPM42.1 dB(A)45.68°C0.996
12.036V5.004V3.281V4.866V896.27351.81°C115.19V
1161.100A9.012A9.065A3.085A824.37482.633%2014 RPM43.1 dB(A)47.08°C0.997
12.024V4.998V3.275V4.855V997.62953.48°C115.18V
CL10.098A14.027A14.003A0.004A117.48375.801%1425 RPM32.3 dB(A)44.06°C0.977
12.119V5.027V3.268V5.087V154.98949.72°C115.20V
CL262.446A1.003A1.002A1.002A764.67383.995%1945 RPM42.1 dB(A)46.78°C0.997
12.032V5.013V3.287V4.991V910.38252.70°C115.19V

Load regulation is fairly tight on all of the rails except for 5VSB, which is worth noting from a budget-oriented platform. Meanwhile, the 750 B3 delivers full power at very high ambient temperatures (>45°C) without breaking a sweat. Its output noise remains low until the 50% load test, after which it exceeds 30 dB(A) during the sixth test and more than 40 dB(A) from the ninth test and up. Generally, though, the fan profile isn't that aggressive, considering this is a relatively low-efficiency PSU.

MORE: Best Power Supplies

MORE: How We Test Power Supplies

MORE: All Power Supply Content

Create a new thread in the UK Article comments forum about this subject
No comments yet
Comment from the forums
    Your comment