Hello,
 
I've just received my new 1080 FTW Hybrid from amazon.com
My system was fully functioning before, I was using the onboard graphics, everything is UEFI compliant and CSM was disabled, fastboot and secure boot enabled.
Now I plugged in the 1080, it wouldn't boot, I pulled out the battery to reset the BIOS, then I was able to access the BIOS settings, HOWEVER, whenever I disable the Compatibility Support Module (CSM) the system does not boot, red light appears and it beeps.
 
The card is new, I've just received it, I thought it has a UEFI BIOS... help me get it up and running.
 
My Mobo is Asus Z97-A
CPU i7 4790k
Corsair semi modular 750w PSU
I have the latest BIOS update for my motherboard, and did not change any other setting
 
can't boot when CSM is disabled. red light. beeps. no display at all. doesn't show anything on screen.
 
Same thing with the slave/secondary BIOS
 
EDIT: fixed CSM issues, see post 2564285  http://forums.evga.com/FindPost/2564285
 
EDIT2: disabled/enabled some SATA ports and now another issue, see post 2564298 http://forums.evga.com/FindPost/2564298
 
 
Update: I don't seem like the only one facing this issue, check http://forums.evga.com/1080-FTW-non-CSM-boot-m2559407.aspx
Current situation: Unable to view boot sequence, no display until windows is loaded, meaning that I am unable to access safe mode, advanced startup options, and the motherboard's UEFI BIOS settings unless I pull out the CMOS battery which enables CSM, which loads/emulates a legacy BIOS then the card shows display during boot / but I must use UEFI, disable CSM as my SSD is UEFI only.

AHowes
You have video set to pci-e in the bios and not the built in? Can't think of the name now as its early.

Card is fully seated and not crooked? Sometimes when you screw the card down it pulls it out of the slot crooked.

Monitor cable plugged into the back of the 1080 and not the built in port on the motherboard?

Sometimes the signal "hand shake" isint reaching the monitor to turn it on. Have you tried unplugging the monitor cable from the card and plugging it back in for the screen to turn on? Power off and on the monitor?

Does it seem like the pc is booting but just no picture will come up? Access led working and flashing?

The card is installed correctly, When the CSM is ON, I am able to access the UEFI bios settings, which shows that the card is running at PCIe x16 link.
 
However, when I change the CSM to AUTO or OFF, the PC does NOT boot at all, all it does is beeps. The display is black, and the VGA_LED is on.

AHowes
Ok so with CSM on you can't get it to boot since it does make it into the bios?

With CSM set to:
 
ON:
PC boots to the UEFI BIOS, the card is detected and displays the UEFI BIOS settings on the monitor connected to the card.
My PCIe M.2 SSD wont boot, as windows is installed using UEFI with SecureBoot, and I believe that the SSD does not support legacy boot.
 
OFF or AUTO:
PC wont boot, beeps on start up, and VGA_LED stays lit.
With the 1080 not installed, the system functions just fine. It boots and does not beep at all.

AHowes
In your motherboard manual at page 2-50 to 2-51 it talks about the cms settings. Your answer is prob there cause there's different options that come up with it enabled.

I've tried various settings.
Even at AUTO, it does not POST. I have no reason to enable it as all of my components should support UEFI.
Furthermore, I need CSM to be set to OFF, in order to utilise my PCIe M.2 SSD, which contains my UEFI Windows installation.
 
Enabling CSM causes all sorts of slowness during the initialisation of my components, especially while my hard drives are in RAID mode, and my PCIe SSD displaying diagnostics information.  All in all, it is not bootable in that mode.

AHowes
Wish I could copen and paste the text on the phone from the manual .pdf file but I cant.

There's a drop down menu that comes up with different options for booting with or without that UEFI.

Also the manual may be updated online, so newer then the printed manual that came with the box.

My brother's evga 970SC boots just fine in my system with CSM DISABLED. Why would I need CSM for my newer card!

And everyday I read of issues getting new 1060/70/80 cards to boot on older mbs.. bios on the cards changed from the older cards.

Nice..

Edit: Changed the SATA settings in the UEFI BIOS, and now the PC beeps when booting, no display until Windows starts up, and VGA_LED stays lit all the time.
 
No idea whats going on....  :S

AHowes
But it's loading into Windows fine correct??

Yes, now it does POST, does not display anything at all until the Windows driver is loaded. I cannot get into the UEFI BIOS settings as there is no display, I can't even see the Windows booting/loading screen. First thing that appears is the Windows login screen
The UEFI GOP is not loaded during boot, that's why I cannot see anything before Windows starts up.
VGA_LED stays lit all the time. PC beeps during boot.
 
The 970SC does not have this weird behavior, something is wrong here...

AHowes
You could use the built in Graphics in the cpu to get to the bios when needed thoigh correct?

No, it detects that a GPU is installed, turns on the VGA_LED, and disables the iGPU (screen stays black all the time).
 
Even trying to enter safe mode via advanced startup options does not work, because Windows relies on the UEFI GOP driver.
 
I will try swapping the 1080 with the 970 later when I'm free.
 
 
 
UPDATE:
After going to the safe mode blindly, and restarting the system the UEFI BIOS DID load the GOP driver during boot, and did display the whole boot sequence on screen, no VGA_LED lit, no beeps. I was able to access the UEFI BIOS settings, no idea what wizardry is happening here..
 
UPDATE2:
After restarting my system for a windows update, the issue is back.. black screen before Windows loads, VGA_LED stays lit, pc beeps, unable to access UEFI BIOS...

Manually set your pci-e lanes to GEN3 mode instead of AUTO. See if that fixes the black screen issue.

Try gen 2 mode.. I remembering reading that for my asus Z97 board back when but it was for older graphics like the 980.

Also is there an auto setting for CSM?

Asus has a forum as well.. can't be the only person using a 1060/1070/1080 card in this board.

Also try emailing asus support with the info you tried and see if they know.

Must be wearing out that pcie slot swaping cards all the time. Heh I remember what a pain it was recently when I had 2 1080 ftw hybrids.. what a pain shaping them over and over testing ea card and having to mount and under mount that rad. Sucks.

I'm doing things slowly now:
Reseted the UEFI BIOS settings of my motherboard by pulling out the battery and doing a power cycle.
Now I can see and access the motherboard's UEFI BIOS settings (CSM auto, the 1080's legacy BIOS loads, but my M.2 PCIe SSD requires it to be off, so I'm stuck in the BIOS settings and can't boot into Windows).
I turn off the system just to make sure that it still works, and I turn it back on, and nothing has changed.
I setup RAID, default boot device, fan settings and restart the system to make sure that it still POSTS, and it does (At this point CSM is not disabled)
Now in order to boot into windows I turn off CSM, since all of my components have a UEFI BIOS, and the 1080 HAS a UEFI BIOS. By disabling it windows secure update and secure boot is enabled automatically.
I reset the system, I hear beep beeep beeep beep, the monitor does not detect any display, and the red VGA_LED is lit all the time.
Windows loads, and after it loads it automatically loads the display driver thingy and I can see Windows now.
I shutdown the system to see if it still posts after a shutdown, and it does.
I restart the system to see if it still posts after the restart, and it does.
Now I cannot access the motherboard's UEFI bios settings, safe mode, advanced startup settings.
 
Again, the 1080 should not require CSM, CSM enables compatibility for older non UEFI compliant devices, and the 1080 should have a UEFI GOP compliant BIOS. enabling CSM loads the legacy BIOS of the card. from what I see the card's UEFI BIOS does not load, that's why there's no display before the driver is loaded I suppose.
 
Also, the evga 970 superclocked in the same system, same configuration, same lane, does not have this issue.
 
I tried the advanced startup option, and now I have a black screen, VGA_LED stays lit, but no beeps, and display never comes on now. I will have to reset the UEFI BIOS settings again I guess. I now know that if it doesn't beep, then it will fail to POST

AHowes
So it sounds like the easy solution would be to either get rid of the m.2 drive and use a regular ssd for your os and use the m.2 drive for other stuff.

Or upgrade the while system mb/cpu/ram to something like a z170 chipset where you won't have this issue.

Sounds cheaper to move the os to a standard ssd drive and finally use the pc and game.

I got a new Samsung 950 pro 512gb and yeah what I've read that you won't really notice the speed difference from it over a regular ssd drive is basicly correct in everyday use.. for rendering videos yeah there's a difference but one could just move that software to the m.2 drive and be fine.

I didn't have this issue with my maximus hero vii z97 system with a 1080 upgraded from a 980 but I wasn't using the m.2 drive.

This is not a solution .
The EVGA GTX 1080 FTW Hybrid should have a UEFI GOP compliant BIOS. Telling me to downgrade my system to legacy bios to support "older devices like the 1080?" and get rid of my fast and expensive SSD is not an option. I'm not buying another PC/system/components anytime soon, and it will not be cheaper, I expect the 1080 that I just bought to work as it should, it is compatible with the system, so it should work. the EVGA GTX 970 SuperClocked works just fine!
 
Also, if the UEFI BIOS has issues, changing the CPU/RAM/other things wont fix a thing... card not working? buy another cpu, ram? 

And why wouldn't it fix it?? I don't have your issue using a Asus maximus hero VIII alpha and I am booting with a Samsung 950 pro 513gb m.2 card with 1080 sli classified cards.. water cooled custom block. First boot I'm in the bios and then off installing win10 pro 1607. Never changed any settings in the bios other then my ram to xmp.

I can't easily swap out my water cooled cards if I had an issue.