• First try removing your sound card and observe the system, if nothing changes you can add it back in.  

• Test your 780 Ti's independently and observe if any one of them will allow the system to work normally.  

• Disable one of the CPU's, test and then repeat for the other one.

Ginio
Hi Erik thank you for your fast reply. I did as you told me and tested both processor as single processor the problem continues with each one. The sound card made no difference. But, the sli seems to be the problem as each card worked flawlessly as a single card but when i set the SLI the problems start . I got some more info about this: when i wrote the topic i was using PCIe-1: 780 ti, Pcie-4: Sound Card, Pcie-5: 780ti, when i started the test i found this article about sr-x pci lanes (): , then i tried pcie-2: sound card, pcie-3: 780ti, pcie-5:780ti, i got a BSOD the moment a enabled SLI on windows (it damaged my nvidia drivers i just finished a clean reinstall the problem CONTINUE. BUT it change something as the fan of the 780 ti on pcie-3 didnt gone 100% after crash (it goes 100% if i use pci-e 1 and 5 for SLI). I'm thinking it´s someway SLI related problem: Could you give me a hint on how to setup this?
How would you setup the 2 780ti for 16xgen 3 SLI and a sound card?  at the moment i'm using pcie-1:780 ti, pcie-3: 780 ti, pcie7: sound card. For the POWER i'm using this: PSU1: Mobo 24 pin, proc 1, 2, 780 ti-1, and 2x 8-pin pcie power for onboard pci power, PSU2: 780 ti-2, fans, hds (no sata, simple hdd and two ssd (one for slack, one for windows)). How should be the chipset bios options for this set?
By the way i think i got my position 1 bios damaged by elilo uefi menu entry but not sure.
Again thank you for your time. any other help will be appreciated.
Sorry for the bad english it is not my first language.
Good weekend.