Hello,
 
I bought the EVGA 1300W Gold PSU specifically because I have a high load, I measured my exact use with a power meter and determined that my setup requires 50W for bare use (CPU/RAM/onboard video card turned on, idle use) + (4*260W) for my 4 GPU's. My power meter shows use of 1120 watts (draw from outlet) which is roughly 86% of the 1300W power supply. Within 5-15 minutes of starting up my server on full load use, the PSU resets my PC and reboots. When I use only 3/4 GPU's, I tried different combinations of the 3 cards to ensure its not a faulty cable or anything else, so long as 3 GPU's are running, its solid. When using all 4, power failure. I thought this PSU should be able to handle 90% of its rating but I can't get it to work. This model was purchased after the recall date so should not be an issue. Anybody have any ideas on what I can do to get all 4 GPU's working?
 
Thank you

I have 2 powered risers (via perif->molex connectors) and 2 unpowered risers in order to avoid stressing the motherboard (Asrock Z77 Extreme4). 3/4 GPU's use standard PCIe connectors, the last GPU uses SATA to PCIe cables. All 4 GPU's are detected and work individually, its just when all 4 are used. The GPU's are Gigabyte 280X (Radeon) which are TDP at 250W. I'm running them stock, no overclocking.

Sorry for not getting back to you sooner and thanks for sending in a ticket to our support. 
 
Gave you a call and left a message on your phone. 
 
Want to learn more on what you are doing with the riser cards.. 
 
The EVGA 1300W PSU is a Continuous Power unit, it should supply you with at least 1300W 100% of the time. 
 
I have even see some reviewers push the unit higher up to 1430W total during tests to show how much more you can get our of it. 
 
Here is the review for reference - http://www.techpowerup.com/reviews/EVGA/SuperNOVA_G2_1300/5.html
 
"EVGA managed to deliver a very strong PSU of excellent quality at a bargain price. Both the G2-1300 and G2-1000 cost the same at the time this review was written, rendering the purchase of the G2-1300 a no-brainer. The latter managed to deliver 1.43 kW of power effortlessly at even over 45°C ambient by keeping all of its rails very close to the nominal voltages and registering ultra-low ripple. This is definitely the ideal unit for a high-end system equipped with three or even four high-end VGAs and an ultra-fast processor. The cherry on top is EVGA's support and the whopping ten year warranty they provide. They are the first to provide a PSU with such a long warranty period, and I think they have set the bar very high—very few companies will have the guts to follow. But competition is never a bad thing. Remember, having one or two companies dominate the field is bad since it kills motives to lower prices or produce better products."
 
There could be something wrong with the unit you have and we can always replace it for you to see if that resolves the issue.
 
Happy to take your call and chat further on this to make sure a RMA is indeed what we need to do next.
 
Thanks, 
 
Mike 

I see what you mean now, looking up the motherboard you said you are using only has 2 PCIE x16 slots.
 
For what you are trying to do, I would suspect you would run into problems.
 
Sorry I did not notice this earlier. Correct me if I am wrong on the motherboard model you have.
 
http://www.asrock.com/mb/Intel/Z77%20Extreme4/

Thanks for the details and the email. 
 
We will get the unit swapped out for you and this should resolve the issue.
 
Thanks, 
 
Mike 

JeanF
Those PSU 1300GT gold are junk . 2 burned on me.. again this evening. I am mad..

Contact EVGA technical support