DC Load Regulation
Testing Methodology
Establishing an accurate load is critical to testing and evaluating a PC power supply. PCPerspective’s power supply test bench can place a precise DC load on the PSU under test. Each power supply is tested under controlled, demanding conditions up to its maximum rated load (at 40ºC), using both 115 VAC and 240 VAC line voltage. Our current suite of tests includes:
• DC Load Regulation
• AC Ripple and Noise
• Efficiency
• Differential Temperature
• Noise
The EVGA SuperNOVA 650 P2 and 750 P2 power supplies were evaluated on both features and performance. A full range of equipment was used to test the power supply under controlled load conditions.
• (2) CSI3710A Programmable DC load (+3.3V and +5V outputs)
• (4) CSI3711A Programmable DC load (+12V1, +12V2, +12V3, and +12V4)
• (2) 200W Precision resistor load bank (+12V5 and +12V6)
• Switchable precision resistor load bank (-12V and +5VSB)
• Agilent 34401A digital multimeter (Accuracy ±0.0035% vDC)
• Extech 380803 Power Analyzer (Accuracy ±0.5% of full scale)
• DS1M12 "StingRay" digital oscilloscope (20M S/s with 12 Bit ADC)
• Powerstat Variable Autotransformer, 1.4 KVA, 0-140 VAC
• Extech Model 407738 digital sound level meter (Accuracy ±1.5 dB)
The following cables/connectors were used to connect the two EVGA PSUs to the PCPerspective power supply test equipment.
EVGA SuperNOVA 650W P2:
• (1) 20+4 pin ATX
• (1) 8-pin EPS/ATX12V
• (4) 6-pin PCI-E
• (2) SATA
• (2) Molex
EVGA SuperNOVA 750W P2:
• (1) 20+4 pin ATX
• (2) 8-pin EPS/ATX12V
• (6) 6-pin PCI-E
• (2) SATA
• (2) Molex
DC Output Load Regulation
To simulate demanding and maximum loading conditions, the EVGA SuperNOVA 650 P2 and 750 P2 power supplies were connected to the load testers and supplied with a constant 115 VAC. In this test we are interested in seeing how well a PSU can maintain the various output voltages while operating under different loads.
The ATX12V V2.2 tolerance for voltages states how much each output (rail) is allowed to fluctuate and has tighter tolerances now for the +12V outputs. I have also included a second table of expanded tolerances (±1% to ±6%) for reference.
SuperNOVA 650 P2: The following tables list the DC voltage results for the 650 P2 PSU while operating on 115 VAC, 60 Hz.
The 650 P2 produced excellent voltage regulation on all of the DC outputs with the measured values falling within ±1% on the three major rails!
SuperNOVA 750 P2: The following tables list the DC voltage results for the 750 P2 PSU while operating on 115 VAC, 60 Hz.
The 750 P2 also produced excellent voltage regulation on all of the DC outputs; nearly identical to the results we saw on the 650 P2.
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.