EVGA N1 750 Load Testing

For those of you that are curious as to some of the reasoning and equipment behind our PSU testing program here at TheFPSReview, we have put together an introduction for you. This program is based on what the author developed at [H]ard|OCP and utilizes the equipment bequeathed to the author by Kyle Bennett. The testing we are conducting today is exactly as described in that document and starts with our 120v, 100v, Torture, and 80 Plus Tests.

120v and 100v Load Testing Results

EVGA N1 750W Power Supply 120V and 100V Load Testing Results Table

Test #1 is equal to approximately 25% of the rated capacity of the N1 750 at 45c. This makes Test #1 equal to 185W by loading the 12v rail to 13a, the 5v rail to 2a, the 3.3v rail to 1a, the +5vsb to 2a, and the -12v to 0.3a. The results of Test #1 show the main positive DC output rails starting above nominal. The efficiency for this unit is starting off in kind of bad shape at a value of 82.74% at 120v AC input and 81.65% at 100v AC input. We see the exhaust temperature is 50C at 120v AC input and 53C at 100V AC input.

Test #2 is equal to approximately 50% of the rated capacity of the N1 750 at 45c. This makes Test #2 equal to 366W by loading the 12v rail to 27a, the 5v rail to 7a, the 3.3v rail to 5a, the +5vsb to 2a, and the -12v to 0.3a. Test #2 sees decreases in our main DC output voltages relative to what we saw with Test #1. The largest changes are up to a 0.13v decrease on the 12v rail, a 0.02v drop on the 5v, and 0.04v drop on the 3.3v rail. The efficiency has moved up to 83.74% at 120v AC input and 82.80% at 100v AC input. We see an exhaust temperature of 52C at 120v AC input and 55C at 100V AC input.

Test #3 is equal to approximately 75% of the rated capacity of N1 750 at 45c. This makes Test #3 equal to 566W by loading the 12v rail to 42a, the 5v rail to 7a, the 3.3v rail to 5a, the +5vsb to 2a, and the -12v to 0.3a. Test #3 sees the 5v and 3.3v rails drop by 0.06v each. The 12v rail has dropped by up to 0.16v. The efficiency in Test #3 moves down to 81.64% at 120v AC input and 79.91% at 100v AC input. We see an exhaust temperature of 56C at 120v AC input and 62C at 100V AC input.

Load Testing Summary

The EVGA N1 750 did an absolutely terrible job on our initial load testing and the only way to summarize the testing is that it failed our testing. When we look at the voltage regulation, we see that the N1 750 had peak changes of 0.29v on the 12v rail, 0.08v on the 5v rail, and 0.1v on the 3.3v rail. However, that is only through 75% load as the unit died after that.

That said, for the tests that this unit would run, these absolute values are not good at all. When we look at the efficiency values posted today, we see that the N1 750 ranged from 81.64% to 83.74% efficient at 120v AC input and 79.91% to 82.80% efficient at 100v AC input. Obviously, none of those values are even approaching decent these days. However, given the overall train wreck that this unit is, bad efficiency values are the least of our concerns. Indeed, this is the worst 750W unit we have ever seen here at TheFPSReview. Let’s move on to the Transient Load Tests now and see how bad well that goes.

EVGA N1 750 Transient Testing

For those of you that are curious as to some of the reasoning and equipment behind our PSU testing program here at TheFPSReview, we have put together an introduction for you that shares a lot of the behind-the-scenes of the program. This program is based on what the author developed at [H]ard|OCP and utilizes the equipment bequeathed to the author by Kyle Bennett. The testing we are conducting today is exactly as described in that document and will continue with our Transient Testing.

Transient Test 1

Loaded/Unloaded

12v/5v

Test #1 is equal to approximately 25% of the rated capacity of the N1 750 at 45c. This makes Test #1 equal to 185W by loading the 12v rail to 13a, the 5v rail to 2a, the 3.3v rail to 1a, the +5vsb to 2a, and the -12v to 0.3a before the addition of the transient load. The N1 750 failed before being able to be tested for its Transient Load Test results.

Transient Test 2

Loaded/Unloaded

12v/5v

Test #2 is equal to approximately 50% of the rated capacity of the N1 750 at 45c. This makes Test #2 equal to 366W by loading the 12v rail to 27a, the 5v rail to 7a, the 3.3v rail to 5a, the +5vsb to 2a, and the -12v to 0.3a before the addition of the transient load. The N1 750 failed before being able to be tested for its Transient Load Test results.

Transient Load Testing Summary

The Transient Load Tests results for the EVGA N1 750 are non-existent as this unit failed before being able to be tested. That was a shocker! (Ed: Really now?) Let’s move on now to see how this unit does in the DC Output Quality aspect of our testing!

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Paul Johnson

Paul is a long time PC hobbyist and tech enthusiast having gotten his start when he broke his first C64 quickly followed by breaking his first IBM XT. Most notably however, for 12 years, he served as the...

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7 Comments

  1. The component selection also features Teapo and CapXon standard electrolytics which the vibes those are giving us deep down in our stomach are the kind that follows a bad taco Tuesday (Ed: Your digestive issues are out of scope for this review!).

    I laughed pretty hard at this line… Thank you for the testing Paul.

  2. [QUOTE=”Denpepe, post: 46703, member: 284″]
    Seems Steve from GN is not the only one killing PSU’s
    [/QUOTE]
    I’ve been doing it since before he was a twinkle in an internet sperms eye.

  3. Well that is a solid pass. I have only owned one of their power supplies. It’s a 1100 watt one for my TR box. It was one of those holiday deals and I got it for around $100.
    I think mostly in my boxes is Corsair units.

  4. Yeah, but score this beautiful dumpster-fire of a PSU and you’ll be placed higher in their queue!!!! What a bargain for me!!!!

  5. [QUOTE=”Space_Ranger, post: 46826, member: 52″]
    Yeah, but score this beautiful dumpster-fire of a PSU and you’ll be placed higher in their queue!!!! What a bargain for me!!!!
    [/QUOTE]
    Silver lining

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