Hi guys, I've been stumped by this new GTX 980Ti(EVGA Classified requires two 8-pin PCIE connectors) I just bought.

Currently running an i7 920 with an Asus P6T mobo with 3x4 GB sticks of ram. Power supply is a Seasonic SS-760XP2. 760W andmy current working GPU is a GTX 680 (requires two 6 pin PCIE connectors.)

I have not been able to get this thing to POST in this rig yet. Well not fully. I hooked up a speaker to it and it gives the normal POST beep, but no video is displayed and after a short time a short beep comes up, and if left on long enough it will keep repeating. The first thing I tried was swapping out PSUs with an older 850W I have but that was a no go as well. Same exact problem with POST beep, no video at all followed by the short beep. I tried looking up this pattern but I could not find anything online with a normal/long beep followed after some time with a short one.

I then tried putting the GTX 680 back in and it POST'd and booted just fine, on both power supplies. Swapped the GTX 980 Ti in and no go. I tried swapping PCIE slots, none of them worked and all gave me back the same problem.

I do have an older ASUS P5E motherboard with a Q6600 and I was surprised to see that the GTX 980Ti POST'd in that board just fine, as did the GTX 680 and an AMD HD 4830.

I have tried stripping down the P6T board down to 1 stick of ram, a keyboard and the GTX 980Ti and even that did not make it past POST.

There are no overclocks on this system, and I have reset the bios settings to defaults using the GTX 680. On an interesting note about the bios, sometimes it would need to be reset after having the GTX 980 in.

I'm at a loss at what I could try or do, the GPU itself is fine as it works in the older board. I just do not see why it would not POST at all in the P6T.

Is there something I am missing or anything else I could try to get this to work? Any help is appreciated, thanks.


Update: Tried using no GPU at all to see what the POST code would be, and it is the standard no video code and not the same one that I am getting with the GTX 980Ti

Motherboard bios compatibility issue for sure. Update your bios to the latest version and try again. If no success try disabling secure boot/fast boot and/or enabling csm inside the bios if the options are available.

Last BIOS is launched before GTX580...
 
You will not like my recommendation but cheapest and best solution for you if you decide to save for new system is
i7-5820K- Micro 2 and 16GB GSkill 2800. You can't build cheaper platform for 980Ti. I mean on normal platform same range as GTX980Ti.
Together that's little cheaper than your GTX980Ti Classified.
 
Maybe ASUS could help, but you need to ask them to send you newer BIOS, you are not only one with same problem.

Possible workarounds...
 
#1 Flash a non-uefi vbios to your 980 ti. Evga should be able to help with this if it's possible.
 
#2 A newer motherboard bios from asus. Asus should be able to update the bios for you and send it to you by e-mail, however, they probably won't help you.
 
If you had a gigabyte board they would definitely help you out. Someone at gigabyte created a new bios for my soc champion due to a issue I was having and sent it out to my e-mail within three days of letting them know what was going on.  
 

So I did a live chat with EVGA and the conclusion seems to be it is a problem with the P6T memory gap setting as opposed to the UEFI. The setting does not seem to be adjustable on the P6T and I am not sure where to go from here. I am attempting to get in touch with ASUS but I am not hopeful.  Thanks for all of the help so far everyone. 

As an update, Asus could not help me with my issue.  I had to upgrade, went to 2011v3 and spent $1000+ more than I had expected to.  There doesn't seem to be a work around for the P6T, this is a really obscure incompatibility.