Internals


Opening the power supply, we are greeted with a nicely arranged interior. The filtering stage is actually located on an extra PCB directly in front of exhaust area (at the right in the above image). A nice detail is that the small PCB is not the same length/height as the main PCB; this means that air will be able to circulate under the main PCB and potentially provide better cooling. The design also means that unlike other designs (i.e. the Zippy Serene), no components are hindering air from coming through, potentially causing some turbulence.



The PFC stage contains the main cap from Hitachi rated at 390µF and 400V. The rectifier bridge also gets an extra little golden heatsink.




The secondary side looks a little crowded, which is a pretty common trait with many other power supplies as well. Most of the cables block the airflow, limiting the ability of the fan to cool components in this area.



All the safety features are supplied by a small chip sitting on a PCB near the cables; this chip is from the Taiwanese company Silicon Touch Technologies, which is the same as most other Enermax PSUs. It works fine and we haven't encountered problems with it so far.

Cables, Connectors, and Fan Test Setup and DC Outputs
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  • Bozo Galora - Tuesday, September 11, 2007 - link

    I am beginning to agree with a poster on another PSU review comment section that your droops near or on the max wattage seem to be more than reported on other PSU review sites, especially 3.3V and 5V.
    It seems to be an ongoing trend in the AT PSU reviews.
    I am waiting to see a PSU review here I can directly compare with another impeccable site with top notch measuring gear.
    Just thinking outloud - heh.
  • strikeback03 - Tuesday, September 11, 2007 - link

    We bought 2 of these power supplies from Newegg for new systems at work. In one, the box apparently did get dinged quite hard; the box was dented and the lip at the top on the cable side of the PSU (where you would put screws through into the case if the case has appropriate holes) was bent as well. Also, I would call the fit of the modular cables more than snug, I thought I might break the mounts in the power supply tring to get them to go in. It seems the pins were not very straight in the cables, as once they finally went in once they worked better thereafter. The cables for the Liberty worked much better, unfortunately they are not compatible without trimming.

    Otherwise they are nice units, and the fan is not audible over the noise of the air handling units in the lab even with the case right next to me and the side panel off.
  • G20C - Wednesday, September 12, 2007 - link

    Could you please tell me what are the lengths of the 24 pin and 4+4 pin connectors on your Enermax Infinity 720W PSU?
    I have an Antec P182 and I want to buy the Enermax Infinity 720W PSU but I don't know if the 2 cables are long enough.
  • Makaveli - Tuesday, September 11, 2007 - link

    I have the 720watt model and its a excellent PSU and well worth the money. I also don't find it loud at all, and my computer is right next to by bed!!

    I also believe the 720watt models fan spins at a higher RPM than the 650Watt model.
  • G20C - Wednesday, September 12, 2007 - link

    Could you please tell me what are the lengths of the 24 pin and 4+4 pin connectors on your Enermax Infinity 720W PSU?
    I have an Antec P182 and I want to buy the Enermax Infinity 720W PSU but I don't know if the 2 cables are long enough.
  • strikeback03 - Monday, September 17, 2007 - link

    Sorry, we have the 650W models, same as this review. I didn't bother measuring, I would assume it is the same as listed here.
  • strikeback03 - Monday, September 17, 2007 - link

    Oops, replied to the wrong instance of this comment. Should be below.
  • Bjoern77 - Tuesday, September 11, 2007 - link

    Any chance that this one is up for on a soonish review? That would be my fav. against the 650w infiniti.
    Anyway, nice review, and thx for not reviewing the 720w infiniti again, which is probably the most reviewed power supply of all time..
  • Christoph Katzer - Tuesday, September 11, 2007 - link

    Will have Seasonic S12II next (sorry for the delay) and Seasonic will surely be happy to send me some more for evaluation.
  • Jodiuh - Tuesday, September 11, 2007 - link

    Don't they make both the Corsair 620 and PC P&C 610?

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