be quiet! is primarily known for its high-end silent power supplies, but in a bid to increase sales sometimes a company needs to address different market segments. This month be quiet! released its new System Power U9 PSUs that are aimed at system builders and will be sold at more affordable prices than other products from the supplier. The new PSUs carry the 80Plus Bronze badge and are rated for 400-700 W output. As the name of the brand suggests, the power supplies promise to be quiet.

be quiet!’s System Power U9 PSUs are compliant with the ATX 12V 2.4 and EPS 12V 2.92 specifications (EPS for 600 W and 700 W only), they fully support Intel’s C6 and C7 power states, as well as meet the Energy Star 6.1 guidelines. The System Power U9 power supplies feature two strong power rails and come with up to four PCIe connectors used by graphics cards and other demanding components. In a bid to make the PSUs quiet, they are outfitted with a 120-mm temperature-controlled fan.

be quiet! System Power U9 Series Output Specifications
  400 W 500 W 600 W 700 W
Rated Combined Rated Combined Rated Combined Rated Combined
+3.3V 24 A 103 W 24 A 110 W 24 A 120 W 24 A 130 W
+5V 15 A 16 A 18 A 18 A
+12V 22 A
18 A
384 W 24 A
20 A
480 W 28 A
22 A
576 W 33 A
25 A
672 W
-12V 0.3 A 3.6 W 0.3 A 3.6 W 0.3 A 3.6 W 0.3 A 3.6 W
+5Vsb 3 A 15 W 3 A 15 W 3 A 15 W 3 A 15 W
Total Power 400 W 500 W 600 W 700 W

The System Power U9 lineup consists of four models rated for 400, 500, 600, and 700 W output. Be quiet! stresses that every PSU from the family is equipped with all kinds of circuit protection as well as over temperature protection (OTP). Meanwhile, since we are dealing with relatively inexpensive PSUs, they are not modular.

Enermax Platimax D.F. Series Connectivity Specifications
Connector type 400 W 500 W 600 W 700 W
ATX 24 Pin 1
EPS 4+4 Pin 1
EPS 8 Pin -
PCIe 6+2 Pin 2 4
SATA 6 5
4P Molex 2
Floppy -

be quiet!’s System Power U9 PSUs are covered with a three-year warranty. The most affordable 400 W PSU will cost $44.9 in the U.S., whereas the 700 W will be sold at $74.9.

be quiet System Power U9 MSRPs
  400 W
500 W
600 W
700 W
Price $44.9 $54.9 $59.9 $74.9

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Source: be quiet!

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  • Dragonstongue - Wednesday, May 30, 2018 - link

    price is "ok" but some of the wattage ratings considering the wattage of the unit label are "not that good" for the asking price (limit of cabling, capacity etc) system builder, maybe, but why would someone IMO pay close to or near identical on the shelf pricing for a "lesser product" is beyond me
    example Seasonic G-650 ( SSR-650RM)
    (can get brand new on sale free ship for $110, or ~$150 full price no sale) Canadian $.
    +3.3 V +5 V +12 V -12 V +5 VSB
    Maximum Power 20 A 20 A 54 A 0.3 A 2.5 A
    100 W 648 W 3.6 W 12.5 W
    Total continuous power 650 W

    Type of Cable Length from PSU
    20+4 pin ATX connector 540mm
    4+4 pin EPS/ATX12V 540mm
    6+2 pin PCI-E, 6+2 pin PCI-E 580+100mm
    Modular Cables
    8 pin EPS12V 650mm
    6+2 pin PCI-E, 6+2 pin PCI-E 560+105mm
    5.25"+5.25"+5.25" 400+115+115mm
    5.25"+5.25" 300+120mm
    5.25" to 3.5" adapter 107mm
    SATA+SATA+SATA+SATA 395+120+120+120mm
    SATA+SATA 300+120mm
    SATA+SATA 300+120mm
    Unit Dimensions (L x W x H)
    160mm x 150mm x 86mm

    so "pricing wise" these seem "ok" but the lack of cabling for the amount of provided power or the limitations of not having the cabling makes them "not as good a choice as others provide out of the box experience"

    to each their own, maybe someone build say a run of the mill Ryzen that only needs a single GPU, 1 or 2 SSD/HDD, single GPU, single cpu power connector, maybe these will be "ok" but they still are facing a very tough crowd of many other PSU vendors for the below $100 mark for "system builders" are they better or worse? (suppose it depends on who the actual maker of these PSU are than anything else TBF)
  • Lolimaster - Thursday, May 31, 2018 - link

    Seasonic S12-II 520w Bronze is still the best bronze PSU you could ever buy. It even beats many platinum rated PSU's at ~10% and <10% load.
  • qlum - Friday, June 1, 2018 - link

    A shame there is no 300w version. For builds with no extra gpu 300w is plenty and for such a build. A bronze rating would yield higher efficiency under average load.

    For some reason retail psu's seem to keep pushing higher wattages with in most cases no benefit for the end user.

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