EVGA 750 B3 PSU Review

Reviews
By Aris Mpitziopoulos
published

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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. 
EVGA 750 B3
Bitfenix BWG750M
Corsair CX750M

Primary Rails And 5VSB Load Regulation

Load Regulation testing is detailed here.

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Hold-Up Time

Our hold-up time tests are described in detail here.

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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.

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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.

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Test #12V5V3.3V5VSBDC/AC (Watts)EfficiencyFan SpeedPSU NoiseTemps (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.


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Aris Mpitziopoulos
Contributing Editor

Aris Mpitziopoulos is a Contributing Editor at Tom's Hardware US, covering PSUs.

See more Power Supplies Reviews
9 Comments Comment from the forums
  • Dark Lord of Tech
    Several complaints in the forums from builders , very disappointed with the B3 series.
    Reply
  • logainofhades
    Yea, I will no longer recommend a B3 series PSU. Seasonic and Corsair's new CX450m-650m are better options right now.
    Reply
  • SinxarKnights
    The solder quality between review samples and retail samples is pretty shady in of itself IMO.
    Reply
  • 10tacle
    The fact that EVGA hasn't even responded to the 450W B3 fail test that was back in August is highly disturbing in an of itself. It is inexcusable to just ignore a tech website's inquiry (and serious concerns) as to why a series of their products are failing. I know EVGA's customer support is top notch in the industry (I've had to use it), but their public/customer relations team needs an overhaul. If I were the CEO, I'd be calling for some heads and light a fire under some backsides to ride Super Flower hard for a fix.
    Reply
  • maxwellmelon
    with out them identifying the failed component how can they say that the PSU not turning back on after a OPP is not intentional setup because it being shut down at 120% of load is about right like they said. It could be designed that way as a safety feature. and a way to sell more psu because when you try to RMA it they can say you overloaded it and is not covered. Operating above 750 watts is above the psu limits and having a one time OPP shut down is still technically having OPP on it.
    Reply
  • Aris_Mp
    When a PSU is broken after OPP's triggering, it is not a feature but a problem. OPP along with the rest of the protections is there to protect the PSU in order not to break when a user goes wild with it.
    Reply
  • Lutfij
    The third paragraph of the last page reminded me of what cars with all souped up aftermarket parts but a crappy driver often results with - disaster.

    EVGA Have recently come under flack on other forums as well and their response isn't, erm, admirable. Nice work with the review, Aris, keep it up!
    Reply
  • rtansey378
    They must be having issues in the CS department. After dealing with them for an RMA I found their website to be down totally twice and fundamentally broken in important other areas during RMA submission. I was getting different answers from different people to basic questions and there were unreturned emails that led to other issues - it was kind of a nightmare overall that went on for a month. Even after being expedited to a manager of some type it wasn't much better. And their 2-3 advance RMA uses UPS ground so it is not 2-3 days at all. It routinely takes them 3 days to get the replacement into UPS' hands and then UPS takes their sweet time. People also use their expensive desktop PCs for work. I went through that twice as they sent the wrong unit back the first time.

    They charge a premium largely on their CS reputation. I guess they are now hoping people won't have to use it and learn otherwise. Being branded as a good guy in the CS is huge. Being branded as a bad guy is a death sentence. You'd think they would at least return major website emails and spin use some good old corporate spin. They won't even do that. Makes you wonder.

    I hope they figure it out. But Im no longer going to pay their premium. If they have the cheaper product then I would still consider them. That will rarely be the case. They did some nice patented stuff with their GTX 1070/1080 revisions so maybe they are putting all their eggs in that basket.
    Reply
  • mlee 2500
    Wow, I expect better from something EVGA puts their name on.

    THANK YOU tom's HARDWARE for performing objective tests on multiple samples to keep us informed and the vendors honest....

    I seriously could have seen myself buying my next PSU based on EVGA's reputation alone. I won't make that that mistake now.
    Reply