EVGA BQ Series 850W PSU Review

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. 

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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.

Though the measured hold-up time exceeds 17ms, the power-good hold-up time is lower than 16ms. By tuning this delay, the power-good signal could be made to exceed 16ms. At least this signal is accurate, since it drops before the rails go out of spec.

Inrush Current

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

Inrush current is high with both voltage inputs. HEC should take a closer look at this.

Load Regulation And Efficiency Measurements

The first set of tests reveals the stability of the voltage rails and the EVGA 850 BQ'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 Haswell-ready 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
Fan Noise
Temps (In/Out)PF/AC Volts
15.165A1.964A1.936A0.995A84.7980.93%1120 RPM
38.8 dB(A)
37.00°C0.987
12.235V5.093V3.405V5.023V104.7740.40°C115.2V
211.365A2.948A2.919A1.196A169.6085.22%1120 RPM38.8 dB(A)38.47°C0.983
12.210V5.074V3.388V5.003V199.0142.94°C115.1V
317.964A3.458A3.434A1.400A254.8586.60%1135 RPM39.0 dB(A)40.11°C0.990
12.179V5.059V3.375V4.985V294.2846.06°C115.1V
424.564A3.963A3.924A1.609A339.7386.80%1150 RPM39.2 dB(A)41.98°C0.993
12.154V5.045V3.362V4.968V391.3848.83°C115.1V
530.866A4.972A4.930A1.816A424.6886.43%1395 RPM43.0 dB(A)43.48°C0.995
12.124V5.025V3.345V4.949V491.3850.53°C115.1V
637.190A5.994A5.945A2.025A509.6785.74%1550 RPM46.1 dB(A)43.64°C0.996
12.097V5.005V3.330V4.932V594.4751.50°C115.1V
743.542A7.019A6.973A2.239A594.6285.00%1665 RPM48.3 dB(A)43.84°C0.997
12.070V4.984V3.312V4.910V699.5952.16°C115.1V
849.917A8.061A8.013A2.451A679.4984.12%1780 RPM49.0 dB(A)44.48°C0.998
12.042V4.963V3.294V4.890V807.7653.13°C115.1V
956.777A8.594A8.566A2.459A764.4983.14%1830 RPM49.7 dB(A)45.29°C0.998
12.010V4.946V3.280V4.877V919.4954.20°C115.1V
1063.378A9.127A9.090A3.091A849.3382.22%1840 RPM50.0 dB(A)45.46°C0.998
11.986V4.930V3.267V4.849V1033.0055.15°C115.2V
1170.652A9.152A9.126A3.099A934.2681.08%1925 RPM51.2 dB(A)46.32°C0.998
11.954V4.918V3.253V4.837V1152.2356.17°C115.1V
CL10.101A19.021A19.001A0.003A156.9677.77%1330 RPM42.2 dB(A)44.07°C0.984
12.184V4.931V3.259V4.976V201.8353.34°C115.1V
CL269.958A1.002A1.003A1.002A851.5182.77%1885 RPM50.9 dB(A)46.58°C0.998
11.982V5.003V3.317V4.922V1028.8056.43°C115.1V

Load regulation is bad, especially on the minor rails (including 5VSB). At least our efficiency measurements do satisfy the 80 PLUS Bronze requirements. Also, the PSU doesn't have a problem delivering its full power under a very high ambient temperature, which actually exceeds EVGA's official maximum rating (40°C). The fan is super noisy though, and even under lighter loads it spins fast. Obviously HEC wants to cool the secondary side's Teapo SC capacitors as effectively as possible, so it tuned the fan's minimum speed to 1120 RPM.

25 comments
    Your comment
  • joz
    At $85 I can get a G2 650W; or even a G2750W on sale.
  • Metteec
    Thanks for the review. Looks like I will be avoiding this one.
  • Metteec
    Also, for $20 more, you can pick up an equivalent gold rated PSU or maybe even a platinum one on sale and after rebates. It is the halcyon days for competition in quality PSUs.
  • _TheD0ct0r_
    1547864 said:
    Thanks for the review. Looks like I will be avoiding this one.


    Why is that?
  • Metteec
    @_THEDICTOR_, for $85, there are so many other better options. EVGA could have been more competitive model if they made quieter version. Instead, you get a PSU with fixed cables, low efficiency, high power variances, and noise like a mini-vacuum. While the higher quality capacitors and warranty are nice, the lack of utility does not make this a good value. 3-years ago, this would have been a great PSU, but times have changed. It is a great day to buy a PSU, just not this one.
  • MasterMace
    appears to be another terrible unit. I'll have to read back and see if it's an Andyson or a HEC
  • Dark Lord of Tech
    Considering the OEM is HEC , not surprised by this review.
  • Nuckles_56
    I would have thought that EVGA could have pushed HEC a bit harder and got a much better unit out of them than this
  • lunyone
    I would personally like to see more 450-550w PSU reviews, not the cherry picked and delivered 750w+ ones that seem to make the rounds. It is just that most people are only going to need 450-550w PSU's for their 1 dGPU based systems.
  • Aris_Mp
    This is not a cherry-picked sample. It comes directly from a store shelf and not from EVGA.

    As for more 450-550W PSU reviews, I am currently working on a 500W unit (which however isn't affordable).
  • logainofhades
    Given the fact that a B2 850 is selling for a couple dollars less, there is no reason to even think about this BQ.
  • lunyone
    1903369 said:
    This is not a cherry-picked sample. It comes directly from a store shelf and not from EVGA. As for more 450-550W PSU reviews, I am currently working on a 500W unit (which however isn't affordable).


    So is all of your reviews come from a retail purchase, or are there some delivered from whichever vendor? Just curious, because I remember reading not too long ago that pretty much all of the products had been items that were submitted from whichever vendor. So I'm guessing that 90-95% of reviews come from vendor delivered samples or am I wrong in that assumption? I'm just curious and not trying to be a troll or anything like that. I think it would be beneficial if the viewer knew whether or not the sample was purchased or offered/delivered from said vendor.
  • Dark Lord of Tech
    The samples come direct from the Manufacturer.
  • lunyone
    276663 said:
    The samples come direct from the Manufacturer.


    Yes I understand that. Aris_MP stated that it came from the Store shelf, so I was trying to get an idea on how many items have been purchased from a Store shelf compared to the ones that the Manufacturer delivers to the reviewer.
  • Dark Lord of Tech
    Most of the time , with most reviews they aren't off the shelf , this is rare , they are sampled direct.
  • Aris_Mp
    Like in almost all product reviews, PSU samples come directly from the manufacturer, which also provides support in case the product breaks down (something that is very easy to happen in a PSU review). Besides a huge budget buying the products from a store would also mean no support in case the PSU dies, since its warranty is voided the moment I set it on my test bench.
  • lunyone
    1903369 said:
    Like in almost all product reviews, PSU samples come directly from the manufacturer, which also provides support in case the product breaks down (something that is very easy to happen in a PSU review). Besides a huge budget buying the products from a store would also mean no support in case the PSU dies, since its warranty is voided the moment I set it on my test bench.


    So the units that you get from the Manufacturer could be cherry picked, even though they still cover any/all issues during the review, which is the point that I was trying to make about getting units that aren't always indicative of what a consumer would experience from buying the product. Not saying this is bad, just pointing it out.
  • Aris_Mp
    yes they could. But this doesn't mean that every manufacturer does that. Even if you buy samples there is always the possibility for changes in the manufacturing line and the next batch to be worse (or better). So you never know.

    Personally I rely on my experience, knowledge and connections to find out not-proper (AKA Golden) samples. There are times that even my readers provide useful tips. E.g. when they do notice a different part in their PSU and report it. This is why I fully break apart every PSU (and all the rest samples in the sites I work for) during a review, a procedure that takes many hours and can be quite hard some times (for instance when you have to fight with Enhance Electronics' huge heatsinks).
  • lunyone
    Oh I understand your troubles that you have to go through. I think it would be more fair, if the manufacturer would allow you to purchase their product from a retail store of your choice and offer the same support throughout your review period. Of coarse re-reimburse you for the cost of the purchase price. This would show the viewer/reader what kind of experience/product that one would expect if they went out and bought said product. I know it isn't going to happen that way, but I feel that would be the best of both worlds. You (the reviewer) would get the support you need from the manufacturer and the viewer/reader would know that the reviewer had purchased the product locally (if possible) and this would reflect a more realistic review of a retail sample.
  • madmatt30
    I don't get it at all.
    While not an inherently bad unit it just seems completely pointless really.
    The fsp made gq850 is just better & its the same price.
    I can understand evga using hec for the budget orientated b1 series but not 850w modular units that are aimed at higher end users.
  • logainofhades
    1031363 said:
    I don't get it at all. While not an inherently bad unit it just seems completely pointless really. The fsp made gq850 is just better & its the same price. I can understand evga using hec for the budget orientated b1 series but not 850w modular units that are aimed at higher end users.


    Yea, when they already had the superflower built B2.
  • Marcus52
    I don't know why EVGA would even consider offering this kind of product. They're supposed to stand for quality, not cheap.
  • Nuckles_56
    59887 said:
    1031363 said:
    I don't get it at all. While not an inherently bad unit it just seems completely pointless really. The fsp made gq850 is just better & its the same price. I can understand evga using hec for the budget orientated b1 series but not 850w modular units that are aimed at higher end users.
    Yea, when they already had the superflower built B2.

    Probably because they are about to discontinue to SF built B2 in favor of this unit
  • logainofhades
    Which would be a horrible idea, as the SF built unit is a far better.