i upgraded from a evga 1070sc to a evga 1080ftw2 and im having issues. i get a instant system crash and reboot when loading PUBG(player unknowns battleground pc game) and sometimes you tube, etc. when it loads fine i can play with out issues but it can take 4 or 5 reboots before i can load the pubg menu. just want to find out what is wrong. i bought the 1080 used, but the original owner used it without issues.  i have the newest drivers 425.31, i have both 6x2 power plugs connected to the card, im getting a new 6x2 pcie cord to try and connect to a different pcie port on the power supply incase its drawing to much power from the same rail.  any suggestions?  

system: 
video card evga 1080 ftw2
motherboard gigabyte gaz97md3h
cpu i7 4790k
ram 16gigs ddr3
power supply evga supernova nex 750b

The serial number is on the card right? I will test the debug mode more carefully, I have played with it some in the past. The new pcie cable should help me confirm if it's a psu issue.

swingbattle
The serial number is on the card right? I will test the debug mode more carefully, I have played with it some in the past. The new pcie cable should help me confirm if it's a psu issue.

Yes the serial number should be on black and white rectangular stick on the back of the GPU. I doubt very much that new cables, considering the quality of the PSU you have will make any difference. And also, many cables are proprietary to the PSU. In other words they are not all wired the same. So if you did not get replacement cables from EVGA for this specific power supply, I would not use them.

I don't have a different system to test on currently. As to the cable, I have read that on multi rail psus, you can over load the amps if your 1080 has both 8 pin pcie cables on the same rail. So I wanted to try separate ports to see if it made a difference. The psu is at least 5 years old( I bought it used) and I'm sure the capacitors are aging somewhat.

swingbattle
I don't have a different system to test on currently. As to the cable, I have read that on multi rail psus, you can over load the amps if your 1080 has both 8 pin pcie cables on the same rail. So I wanted to try separate ports to see if it made a difference. The psu is at least 5 years old( I bought it used) and I'm sure the capacitors are aging somewhat.

Did you:  One thing you can try is on the Nvidia Control Panel under Help, is an option called "Debug Mode". If you select that, the GPU will run at the reduced vanilla boost clocks until you reset it. If the GPU is more stable that would point toward an issue with GPU.

I'll give the uninstall a shot when I get some time.