DC Load Regulation and AC Ripple
DC Output Load Regulation
To simulate real world and maximum loading conditions, the EVGA SuperNOVA NEX750G Gold PSU was 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.
The following tables list the DC voltage results for the PSU while operating on 115 VAC, 60 Hz.
The NEX750G PSU produced excellent voltage regulation on the +5V output while the regulation on the rest of the rails was within specification and acceptable, just not as good as we would like to see on a premium power supply.
AC Ripple and Noise on the DC Outputs
The amount of AC ripple and noise present on the DC outputs was checked using a digital oscilloscope. This AC component may be present in the KHz range where most switching power supplies operate or it may be more prevalent at the 60 Hz line frequency. We adjust the O-scope time base to look for AC ripple at both low and high frequencies. The ATX12V V2.2 specification for DC output noise/ripple is defined in the ATX12V Power Supply Design Guide.
Ideally we would like to see no AC ripple (repetitive) or noise (random) on the DC outputs – the cleaner the better! But in reality there will always be some present. I measured the amplitude of the AC signal (in millivolts, peak-to-peak) to see how well the power supply complied with the ATX standard. The following table lists the ripple/noise results during all of the load tests for the main output voltages of interest.
The EVGA NEX750G power supply exhibited acceptable AC ripple suppression on all of the primary outputs but was overall higher than we would like to see on a premium grade, enthusiast power supply; particularly on the +3.3V and +5VSB outputs.
Shame that the regulation
Shame that the regulation isn’t a bit better. I love the modular design, but at the price there are some really nice Corsair models that are hard to compete with.
Indeed, why did they go with
Indeed, why did they go with group regulated Aurum, when there are way better designs on the market. I guess they thought having Gold certificate immediately makes unit premium class. Hint: it doesn’t.
Corsair makes the shittiest
Corsair makes the shittiest products since the comming of the so called “i” generation.
I’ve had 3 broken h100i’s so far.. A customer returning an AX760i and a AX1200i.. they all had the same issues, link broke after a while, causing shortage or something like that matter. And making the unit completely useless..
So b**** please, don’t tell people to go to corsair nowadays, it’s a shame how you people deny quality over a “name”.
I have this unit since the beginning and it never bricked on me.. the multi rails seem to be working super and I have none to minor fluctuation what so ever in my voltages and amps.
And I hear people say stuff, like yeah MULTI RAIL IS BAD.. Damn people this aren’t the 2004’s anymore.. This unit was build like a GOOD multi rail.. not a dual rail 10a + 25a hybrided together like OCZ used to do.
This PSU is a joke, end of
This PSU is a joke, end of story.
I got the 650 supernova for
I got the 650 supernova for $70. From the small number of reviews I have read I think it is a bargain. $100 seems to be about the price now. I also got free shipping.:-) I have a Thermaltake toughpower 675 which has been great. The evga is going to replace a old thermaltake 430 with only 20 pin atx connector and 4 pin cpu..
It is amazing to me all the
It is amazing to me all the power supply aficionados. Well they think they are anyway. They are in fact followers not leaders and parrot what they hear from their masters….really, it gets old. Spend their life in their moms basement and spend someone elses money to get their rigs built.
This is a quality unit, it is not the best out there but it is light years from the worst. If you get it at a good price it will serve you well. The 650G runs an overclocked AMD FX based system complete with all the accessories, water cooling system etc…….also drive two 770s heavily overclocked with the voltage to board mod to run the voltages I want and the clocks as high as I can. That wasnt the original plan, it was planned for a single 770, but thats what it is and it runs it fine because it doesnt just say “650” on the side of it, it runs at just below that number continuously. Hold it in your hand and you will see and feel the quality. Then there is the 10 year warranty, you can see how scared that EVGA is the build quality of this PSU sucks. I get tired of the disinfo. To the above negative poster, put down your coolermaster or sparkle magic PSU and step up to a decent PSU. Thank me later.
cheers for the sensible
cheers for the sensible comments, I was struggling to decide on a psu as I keep running into dumbass commentors, I narrowed it down to this precisely because they were bold enough to stick a 10 year warranty on it… 10 years for christs sake,, 10 yrs is a great statement on their belief in this psu.. what could you possibly whinge about with that….
and before it even gets said,
and before it even gets said, when you register this unit with evga, it adds 5 more years on the warranty.
$89 with rebate at
$89 with rebate at MicroCenter. That makes this a very good PSU for the price.
Is it really that bad+ i am
Is it really that bad+ i am 14 and i have a i5 4670K, Asus maximus Hero and a 780 Classy. Is this psu so bad? 🙁
Is it really that bad+ i am
Is it really that bad+ i am 14 and i have a i5 4670K, Asus maximus Hero and a 780 Classy. Is this psu so bad? 🙁