I bought a supernova NEX 750w Bronze PSU. It's rated for 750w, but can't even power one of my rigs that only pulls 530w AC from the wall, which really means it's pulling 450 watts DC! It's fine idle, but when loaded 450w, the system keeps shutting off after 10 sec. It was a new PSU, so I kept thinking it's my motherboard or any other components causing instability, but after a very long of diagnosing, I found out it's the PSU. I put in a Seasonic 750w 80plus gold, and all crashing went away.
 
There was a lot of frustrations figuring this out, and I'm about to return it to the retailer since it's still within the 30 days. Is this normal? Or what can I do to fix this before I return it? I'd rather keep it if there's anything I can do.

I was going to get a EVGA psu for my upcoming build but these horror stories have turned me off. I swear it seems the ONLY EVGA products worth trusting is their video card line. Been hearing so many issues with their various non-video card products lately.

_Nite_
I had a somewhat simalar problem, I bought a evga 500w for a lower end system that only had a single GTX 560 with minimal other components, and while it was able to power it, the +12 rail dropped down to 11.63 which is horrible, I didn't not expect it to go that low for only pulling around 200 - 250w from the walll, it has a 40a +12 rail which means its suppose to handle up to 480w

Ok I will check the 12v rail to see how low it goes. But is there anything I can do to fix this constant shutting off? I'm trying to avoid returning it, and I don't think an RMA to EVGA will fix this because I don't want to chance that all the NEX750B have this same problem. I don't want downtime for nothing.
 
 
 

_Nite_
So if you want my advice, Yea stay away from evga power supplies....

Killmur
I swear it seems the ONLY EVGA products worth trusting is their video card line. Been hearing so many issues with their various non-video card products lately.

To be fair though, I also have a EVGA 1300G supernova and that one works without a hitch.
 
And EVGA's video card is no different than any other nvidia video card, everyone just brands the reference designed ones as their own. Now if EVGA directly manufactured these video cards or any other products and it works awesome, then that's another story.
 

My evga 750G has been strong for 6 months... My dark is problem free.. It's super flower who oem's for evga... Super Flower took seasonic's spot for lowest failure rate last year...

Ok I just tested this problematic PSU on another known working computer, and it's crashing that one also. I'm pretty fed up with wasting time with this so I'm just going to return it.

My 750B has been powering the rig in my sig flawlessly. I've had it for around a year now. No issues. As with any eletronic components, its the luck of the draw. Sometimes you get a dud. 

_Nite_
I had a somewhat simalar problem, I bought a evga 500w for a lower end system that only had a single GTX 560 with minimal other components, and while it was able to power it, the +12 rail dropped down to 11.63 which is horrible, I didn't not expect it to go that low for only pulling around 200 - 250w from the walll, it has a 40a +12 rail which means its suppose to handle up to 480w
 
So if you want my advice, Yea stay away from evga power supplies....

 
May I know how you were measuring the +12V rail?

_Nite_

EVGA_JacobF

_Nite_
I had a somewhat simalar problem, I bought a evga 500w for a lower end system that only had a single GTX 560 with minimal other components, and while it was able to power it, the +12 rail dropped down to 11.63 which is horrible, I didn't not expect it to go that low for only pulling around 200 - 250w from the walll, it has a 40a +12 rail which means its suppose to handle up to 480w
 
So if you want my advice, Yea stay away from evga power supplies....

 
May I know how you were measuring the +12V rail?

I used aida 64 and cpu-z and while the card was running at 100% load with folding@home cpu was idle, running minimal components, single hardrive, dvd drive, 2 sticks of ram. and a couple case fans.
 
 

You can't trust software readings, be it aida 64, BIOS, CPU-Z, or whatever.  The only way to accurately measure is with a multi-meter.  I did a demo of this in the old forums.  My +12V was reading around 11.4V in the BIOS and HW Monitor was the same.....however, with a calibrated multimeter my +12 was 11.98V.  A few months ago on the PSU I have now, I checked with aida and it showed 11.86V, which is fine....but at the same time the multimeter was showing 12.03V.
 
A multimeter is the only way to know what the true readings are.

_Nite_

kaninja

_Nite_

EVGA_JacobF

_Nite_
I had a somewhat simalar problem, I bought a evga 500w for a lower end system that only had a single GTX 560 with minimal other components, and while it was able to power it, the +12 rail dropped down to 11.63 which is horrible, I didn't not expect it to go that low for only pulling around 200 - 250w from the walll, it has a 40a +12 rail which means its suppose to handle up to 480w
 
So if you want my advice, Yea stay away from evga power supplies....

 
May I know how you were measuring the +12V rail?

I used aida 64 and cpu-z and while the card was running at 100% load with folding@home cpu was idle, running minimal components, single hardrive, dvd drive, 2 sticks of ram. and a couple case fans.
 
 

You can't trust software readings, be it aida 64, BIOS, CPU-Z, or whatever.  The only way to accurately measure is with a multi-meter.  I did a demo of this in the old forums.  My +12V was reading around 11.4V in the BIOS and HW Monitor was the same.....however, with a calibrated multimeter my +12 was 11.98V.  A few months ago on the PSU I have now, I checked with aida and it showed 11.86V, which is fine....but at the same time the multimeter was showing 12.03V.
 
A multimeter is the only way to know what the true readings are.

Aida 64 IS accurate, I been using it for years, my Corsair TX 750w is showing 11.81 for my GTX 770 and GTX 460, 3 hardrives, dvd drive, 6 case fans, and overclocked 2600K all at 100% load running together which is more realistic, the fact that the evga 500w can't stay above 11.63 with just a single GTX 560 alone running at 100% load with minimal components is horrible, the PSU is at fault, NOT the software in my opinion.
 
I've had the +12 rail drop below 11.6 on aida 64 before on previous systems I've had and the system automaticly restarted when it goes that low, so I know what I'm talking about.

Aida64 accurately reads the super I/O chip or whatever you want to call it (winbond) etc.  However, the chip itself is rarely anywhere close to accurate.  I didn't mean to make it sound like you don't know what you are doing.....but voltage readings are rarely accurate via ANY software.  When I have time I will do another thread on the problems with trusting software voltage readings.  I will use all the current popular programs including Aida64 and then use a calibrated multimeter.  Cheers.