Efficiency
Efficiency is defined by the power output divided by the power input and is usually expressed as a percentage. If a PSU were a 100% efficient (which none are) 600 watts of AC power going in would result in 600 watts of DC power coming out (with no waste heat to dissipate). In the real world there are always inefficiencies and power is lost in the form of heat during the conversion process. Newer revisions to the ATX12V Power Supply Design Guide V 2.2 have continued to increase the efficiency recommendations for PC switching mode power supplies and now lists both required and recommended minimum efficiencies.
We measured the AC power input to the two SuperNOVA P2 power supplies with an Extech power analyzer while the total DC load was found by adding all the individual +3.3V, +5V, +12V, -12V and +5VSB loads together.
SuperNOVA 650 P2:
The overall efficiency of the EVGA SuperNOVA 650 P2 power supply is very good and easily meets the criteria for 80 Plus Platinum certification while operating on 240VAC but struggled a little while operating on 115 VAC at elevated temperatures. However, this is not a big deal as we frequently see this. The 80 Plus Org certification tests are conducted at room temperature (25°C) and our tests are conducted at elevated temperatures (up to 40°C). Efficiency typically decreases as the temperature increases.
SuperNOVA 750 P2:
The overall efficiency of the EVGA SuperNOVA 750 P2 power supply is also very good and also meets the criteria for 80 Plus Platinum certification.
80 Plus Program
Note: Tests conducted at room temperature (25°C)
I can add to the list of
I can add to the list of disadvantages: extremely rigid cabling and very tight connectors (caution is advised with Molex in particular). I have first hand experience with EVGA PSUs and while great as a PSU box little details make them highly questionable purchase. Included cabling for example is by miles more flexible with Corsair. Best thing you can do is to buy cable set from CableMod (not EVGA). You will see then how cables should be made for such premium priced PSU.
Perhaps smaller models have different fans, but I can certainly say that EVGA fans are loudest I’ve heard in a long time – again Corsair is top of the pick for quiet. Noise from 1000 P2 or 1200 P2 dwarfs multiple HDD arrays and ~20 fans in each system. Ecomode is all nice, but its sole purpose is to shut the racket from cooling fan.
Big EVGA fan, but they shouldn’t just auto-copy Leadex/SuperFlower without any improvements.
Also an EVGA fan- and my main
Also an EVGA fan- and my main selling point is the 10 year warranty. PSUs at these ratings with this warranty at this price are a bargain AFAIC. You are into boutique-ville after this.
I would also like to see smarter PSUs. Cabling is not that big of an issue with me and I love modular designs where I don’t have to figure out where to put the excess cables any more. The EVGA I have is not noisy at all.
In all, this review agrees with what I’ve seen. It has been a great product to me so far.
With such low ripple-
Do the
With such low ripple-
Do the cables have in-built caps???????????????
Something one might want to test sometime-
Does a extremely low ripple PSU like this have any
significant benefit for on-board audio compared to
a cheaper noisier PSU?????????????????
Edit: Yes, small capacitors
Edit: Yes, small capacitors are built into the ends of the CPU and VGA cables – under the heat shrink. The 650W PSU has one CPU cable with both a 4+4 pin and 8 pin connector. The 750W PSU comes with two CPU cables, one with an 8-pin connector and the other with a 4+4 pin connector.
JG must have a slightly
JG must have a slightly different model to you-his has
capacitors in cables-looks the same.
http://www.jonnyguru.com/modules.php?name=NDReviews&op=Story2&reid=446
Yes, you are correct (and I
Yes, you are correct (and I was wrong). I have edited the response above – thanks for pointing it out!
What about the torture load?
What about the torture load? Did you guys check it on how much torture load it can handle. Because that will give the most accurate idea about how much power supply it can sustain through. Please do the torture load test. I have been asked this question by one of my blog readers where I reviewed this power supply. you can see here (https://www.glinkster.com/best-power-supply-for-gaming/)
One thing more I don’t like about this power supply which I also mentioned in my review is the plastic connectors on one end are split while the other end is not. Apart from that, it is a great looking power supply and it simply amaze me with its low noise. And yes I agree, the 10 year warranty is the main selling point in this PSU.