Well, I think there is not much options you have.
first one - your gpu is fried.
second one - your riser is fried.
I think, most likely the worst thing happened, and I hope you do have RMA option..
but to confirm that it is not the riser or the PCI-e port on mobo, try to install this card with different riser into different pic-e slot and try again..
Topic: 1080ti SMOS - cudaGetDeviceCount failed (Read 108 times)
Anyone ? 
Hey, I have been mining for a few months and everything worked fine until today, I saw that one of my gpu's isn't mining.
I tried restarting but still wasn't showing, So I disconnect all the other Gpu's and now im getting this error
============ Starting Miner ===============
# zm 0.6
cudaGetDeviceCount failed
Miner ended/crashed. Restarting miner in 10 seconds --------------
tried changing cables and even moved the gpu to my other rig but still same problem, the fans and light turn on but it wont mine.
Spec:
1080ti gigabyte 11g
MB: Asrock btc+ h110
Using Simple Mining OS, mining zcash
Thank you
I tried restarting but still wasn't showing, So I disconnect all the other Gpu's and now im getting this error
============ Starting Miner ===============
# zm 0.6
cudaGetDeviceCount failed
Miner ended/crashed. Restarting miner in 10 seconds --------------
tried changing cables and even moved the gpu to my other rig but still same problem, the fans and light turn on but it wont mine.
Spec:
1080ti gigabyte 11g
MB: Asrock btc+ h110
Using Simple Mining OS, mining zcash
Thank you
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