Crosshair V Formula Z: Wont boot when two GTX 760's in SLI... 1 760 boots fine UEFI

[bda714]

I have a Crosshair V Formula Z motherboard and have had two Geforce 760's in SLI mode running great while in MBR legacy with CSM enabled. When I picked up the ROG RAIDR PCIe SSD I decided to make the switch to a true UEFI system and during boot the system freezes on a black screen with a Q Code error of "0d" which in the manual reads as "Reserved for future codes" basically. While monitoring with ROG connect from laptop in string this code reads as "USB Init." So with the point that everything locks up leaves me no way to even access the bios/EFI settings, only choice being to clear cmos. When I remove one 760 card, boots fine everything works.
Has anyone encountered or heard of this? Please help if possible, i have spent much time looking for an answer, THANK YOU very much! Any suggestions are welcome and very much appreciated.

[2622572]

Yup. Exact same problem here, c5fz, two zotac 760 amps, Samsung ssd, 760s work fine without csm, but I get 0d with two cards.

[chrsplmr]

First place to start is full system specs., including software running.
Where is the boot failing ?

2622572- You could start a Thread.

Welcome to ROG. .c.

[bda714]

chrsplmr wrote:
First place to start is full system specs., including software running.
Where is the boot failing ?

2622572- You could start a Thread.

Welcome to ROG. .c.

So thank you for responding, sorry for taking so long but I just had to get away from this issue after so much trouble with it for a long time, and here is why... I have been through two complete RMA process and still have the same problem, I have spent hours on the phone with ASUS customer support, which is the worst customer support I have ever dealt with. I have learned that ASUS had thousands of complaints filed with the BBB within the last six months. I was assured both times my board was returned that the problem was fixed, which it was not. I have been charged for service and shipping iwas told that iwould not be charged for. And the only positive, kind of, is that I have found acouple others with the same problem but have not found a fix.
I can't believe that a company as renowned as ASUS would release a product with this big of a problem, and than just turn their back when customers need help. It is wrong and completely unethical.
So that being said, I hope someone out there will eventually stumble upon this post again that can offer some sort of advice.
Chrsplmr- here are some more specs;
-Asus crosshair v formula z, latest bios is flashed.
-AMD FX9370 4.4Ghz / 4.7Ghz max.
-1000 w Raidmax power supply model #RX-1000AE.
- I have tried multiple RAM units but my constant is the corsair gold 16Gb.
-Windows 8.1 pro
-boot process freezes before anything shows up on screen and shows a q code of "0d". I have checked it with ROG connect feature while monitoring with laptop and freezes while showing USB init. (I have already tried everything regarding usb.)

if there is anything else you would need just let me know. Thank you for your time.

[chrsplmr]

First place to start is full system specs., including software running.
Where is the boot failing ? .c.