Efficiency and PFC


500W Efficiency


600W Efficiency


700W Efficiency

The efficiency is very good on these units, as we would expect from any PSU with an 80 Plus Gold certification. Even though they do much better with 230VAC, buyers in the U.S. market will also be able to enjoy efficiencies of up to 90%. The 500W unit is the only one able to reach 91% on 115VAC at around 250W load. Users with 230VAC will be able to enjoy premium efficiency, with the 700W models providing 92% efficiency over a relatively large range of loads. We have never seen efficiency curves as high as the ones Enermax is able to deliver with the Modu87+ and Pro87+. The 500W unit is at 88% efficient at 20% load (100W) and stays above 90% from 200W until its maximum rated output! This is truly the best efficiency of any PC power supply we have seen here at AnandTech so far. According to Enermax, the 700W unit is the most efficient since it is easier to reach higher efficiency with higher wattages; yes, we can confirm that. With 92% efficiency at 50% load (350W) the 700W units performs just amazing.

Power Factor Correction


Anyone who pays for reactive power from the grid will be happy with the PFC these units achieve, as they are all very good.

Temperatures, Fan Speed, and Acoustic Noise Efficiency Comparison and How to Choose Your PSU
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  • rudolphna - Tuesday, January 19, 2010 - link

    Very nice to see a new PSU review on anandtech, I was worried you guys had forgotten what made you popular- reviews of real products not just blog after blog. I have a suggestion, if I may. The Antec Neo Eco 400W power supply. I actually just bought one, it seems like a good deal. It has a 30 amp 12V rail (360W) a 120mm fan, and is 80plus certified. Not sure who the OEM for it is, I'm thinking Seasonic. But you guys should check it out. Great review by the way.
  • papapapapapapapababy - Tuesday, January 19, 2010 - link

    good luck finding a replacement for that gold monstrosity. so that make this crap a n buy for me. You see, i like to change the fans on my psu ( better fans) in order to control them myself.
  • strikeback03 - Wednesday, January 20, 2010 - link

    Might still use 140mm mounting holes, and just be a 139mm fan to avoid a stupid patent.
  • Calin - Wednesday, January 20, 2010 - link

    Hard to think you'll need a fan better than that - 50 Celsius for the vented air and almost totally silent even at maximum load?
    I have an old Seasonic 350W (12 cm fan) which I felt was totally silent in typical operation (closed case, computer under desk), and after about four years it still is totally silent.
  • papapapapapapapababy - Wednesday, January 20, 2010 - link

    is not hard to think _ for me_ the big fan dsnt follow a standard, it has no other use for me, if a buy 4 120 fans i could give the multiple uses/ ( psu replacement fan, case fan, cpu fan, low speed fan, high speed fan, etc, - btw cases with big fans are terrible) one huge big ass fan? no other user ¡ difficult to find = no thanks.
  • papapapapapapapababy - Wednesday, January 20, 2010 - link

    is not hard to think _ for me_ the big fan dsnt follow a standard, it has no other use for me, if a buy 4 120 fans i could give the multiple uses/ ( psu replacement fan, case fan, cpu fan, low speed fan, high speed fan, etc, - btw cases with big fans are terrible) one huge big ass fan? no other user ¡ difficult to find = no thanks.
  • Voldenuit - Tuesday, January 19, 2010 - link

    Why use such a cumbersome term as Cable Management (which refers primarily to the neatness of cable routing) when 'Modular' is much more apt (and specifically referred to in the product name)?

    Nobody makes 'cable management' PSUs, but quite a few companies make 'modular PSUs'.
  • Mumrik - Tuesday, January 19, 2010 - link

    More comparisons (especially in the benchmarking) to competing products (rather than just the other two in the series) would really be nice. I actually have come to expect it at Anandtech.

    To me, this came off as a bit more of a fluff piece. Not a disguised commercial but more like something I'd find at most other hardware sites.
  • ap90033 - Friday, January 22, 2010 - link

    I thought this was a good article on specific hardware. But then again I am not the uber geek with no life like some seem to be around here....
  • RaistlinZ - Tuesday, January 19, 2010 - link

    Geez, and I thought the X-Series was overpriced. Sure, these Enermax PSU's are efficient, but certainly not $50.00 more efficient than say, an Corsair 750HX. If they come with a $30.00 MIR then they might be worth the money, but otherwise I'll pass.

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