Conclusion

It is clear that the Infiniti is at the moment the best power supply in the Enermax portfolio. It has pretty much everything a user could wish for. The focus of the Infiniti is definitely not the mainstream market but more the high-end enthusiasts. We intentionally tested the 650W version of the Infiniti, since we wanted to show what the lower performing version can provide. A 720W version is also available, but for many users that would simply be overkill. The build quality is very good and Enermax takes no chances with low quality components. The case of the PSU comes with a nice looking brushed exterior, and in combination with the golden fan grille this will be an eye catcher in store displays and possibly inside your PC.

Efficiency Comparison

From the efficiency point of view, the Enermax Infiniti is playing in the top ranks of our comparison list which shows the highest measured efficiency of each unit we have tested so far. Indeed, the Infiniti has a very good efficiency rating over the whole range of input voltages. At most loads it remains above 80%.

Efficiency Comparison

Whoever buys an Enermax PSU can also rest assured that they will have enough cables and connectors for just about any conceivable configuration. Enermax is a company that pays attention to detail, and they don't skimp on the extras. As already stated, Enermax was also the first company to provide PSUs with 8-pin PEG connectors on a retail product, long before much of the competition. The Infiniti comes with three 6-pin PEG connectors, one of which is transformable to an 8-pin PEG connector. This is definitely nice for a 650W power supply.

The inside seems to be nicely arranged but we do feel strange about the similar temperatures with any kind of ambient heat. The heatsinks have a decent size and it's good to see that secondary heatsink is bigger than the less warm primary one. The air still has enough space to slip through to the PCB on all sides of the heatsinks which will provide the other components with a little cooling air.

The DC output has been very stable and no rails even went close to being out of specification. The 12V rails in particular are consistently very high with loads of up to 300W, and they never go lower than 12.05V.

Since the Infiniti has been available for a year now, the prices are quite stable. You can get this 650W PSU for about $190 plus shipping in the US. The cheapest price in Europe is about €140 which equals the $190 price in the US. For a 650W power supply the price is definitely not cheap, and users will need to decide if the package offers enough value to warrant a purchase. There are surely other power supplies with similar quality, fewer unnecessary accessories, and a lower price. If saving a Jefferson or two isn't high on your list of priorities, however, the Enermax Infiniti is a good quality offering.

Temperatures, Fan Speed, and Acoustics
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24 Comments

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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.
    Reply
  • 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.
    Reply
  • 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.
    Reply
  • 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.
    Reply
  • 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.
    Reply
  • 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. Reply
  • strikeback03 - Monday, September 17, 2007 - link

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

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

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