Ok..it seams everone has the same default BIOS ver for there cards...take a look at mine...this is the stock GTX1080FTW2ICX any ideas...lol..looks like im running the 10GHz rom ??

Yep...but a different stock bios?????? .......at least different from Kaisia with the same card......... as he mentioned three posts before yours.
 
 

What I see is:
https://www.techpowerup.com/vgabios/192260/evga-gtx1080-8192-170405
https://www.techpowerup.com/gpudb/b4546/evga-gtx-1080-ftw2-w-icx-cooler-11gbps
 
and
https://www.techpowerup.com/vgabios/190293/evga-gtx1080-8192-170118
https://www.techpowerup.com/gpudb/b4177/evga-gtx-1080-ftw2-w-icx-cooler
 
And from the looks of the Nvidia chip there is a difference.......
10gbps is: S Taiwan 1620A1     GP104-400-A1
11gbps is: S Taiwan 1707A1     GP104-410-A1

I'll try the rom binari0 posted and report back when I can!
 
And thanks Dikonou, it appears mine is most likely the 1620A1. Can someone confirm if this is why some FTW2's do not work?

For those on FTW2 cards

Download the latest version of nvflash, disable the card in device manager (right click disable) and flash ONLY these two.

Typically the quote doesn’t copy links so go a few pages back and find the post.

Sajin
Master 11 GHz .rom: 
Slave 11 GHz .rom:  (says it's for the ftw2 dt, but that is incorrect, it's actually for the ftw2 6686 model.) 

Bluntwrapped1
For those on FTW2 cards

Download the latest version of nvflash, disable the card in device manager (right click disable) and flash ONLY these two.

Typically the quote doesn’t copy links so go a few pages back and find the post.

Sajin
Master 11 GHz .rom: 
Slave 11 GHz .rom:  (says it's for the ftw2 dt, but that is incorrect, it's actually for the ftw2 6686 model.) 

Hey, thanks for the response! This was actually what I did and use but did not work (post #318) 

And something else I've noticed  ( don't know if it's important )........
for these three bios versions the Graphics Cars Subsystem Id:  has a linear increase in the last digit.....
 
https://www.techpowerup.com/vgabios/197515/197515
Subsystem Id: 3842 6685
VBIOS Version 86.04.66.01.80   [ 197515.rom ]
 
https://www.techpowerup.com/vgabios/190293/evga-gtx1080-8192-170118
Subsystem Id: 3842 6686
VBIOS Version 86.04.3B.40.80  [ EVGA.GTX1080.8192.170118.rom ]
 
https://www.techpowerup.com/vgabios/192260/evga-gtx1080-8192-170405
Subsystem Id: 3842 6687
VBIOS Version 86.04.66.00.80 [ EVGA.GTX1080.8192.170405.rom ]
 
 

Yep in my case 3842 6685 is the default, so use the 3842 6687 and works perfect. But i have 11ghz in the stock bios the problem was the clocks to low. Cheers

I just purchased at GTX 1080 SC2 ICX and I believe my memory is 1251 mhz. 320.3 Gb/s.
 
It did not get shipped with the updated bios.
 

I just gave up on mine with this particular BIOS version and subsystem ID. I just overclocked it to achieve 11Ghz. It shouldn't be much different, right?
 

 

 
I could push it to +800 and still stable but I lose out on frames so I settled on +564.