EVGA SuperNOVA 850 P6 Power Supply Review

The EVGA SuperNOVA 850 P6 is a good PSU, but the 850 G6 is a better choice.

EVGA SuperNOVA 850 P6
(Image: © Tom's Hardware, Shutterstock)

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Performance Rating

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Overall performance is not as strong as most of its competitors and lower than the 850 G6, which is less expensive.

Noise Rating

The graph below depicts the cooling fan's average noise over the PSU's operating range, with an ambient temperature between 30 to 32 degrees Celsius (86 to 89.6 degrees Fahrenheit).

(Image credit: Tom's Hardware)

The fan speed profile is aggressive, leading to over 30 dBA average noise output. What makes an impression is that the less efficient 850 G6 scores better here. 

Efficiency Rating

The following graph shows the PSU's average efficiency throughout its operating range with an ambient temperature close to 30 degrees Celsius.

(Image credit: Tom's Hardware)

Average efficiency is satisfactory. Still the competition scores better. 

Power Factor Rating

The following graphs show the PSU's average power factor reading throughout its operating range with an ambient temperature close to 30 degrees Celsius and 115V/230V voltage input. 

The APFC converter needs tuning, especially with 230V input. 

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Contributing Editor

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

  • Co BIY
    Thanks - I've been asking for this review.

    Hard to beat the Corsair RMx 850 right now when it is shipping direct from them at $115.

    I think a discussion at the beginning of each review that hits on the right use case for the power supply would be helpful. Do I need a 850 Watt power supply ? Is there any advantage to going lower or is this supply just as efficient all the way down the ladder so that getting the optimum wattage isn't that important?