Hey Spirit,
 i using the 4960, well for the sound card issue, i think all the problems stem around the mobo set on nvme, it just has little twerks about it on x79 boards, this weekend i'm goint to run it on my intel 730 ssd, just to see how everything reacts, whatever i find i will let you know..
  as for the driver for sbx card i have the latest from creative support...
  Intel did suggest to run the 750 on the x99 mobo, after some reading some are having goofy things happen on them too..
  hope this helps, goodluck with yours...

Just bought a 400GB 750 a few days ago. It should arrive soon. I'll post my experience installing it on my X79 Dark in the coming days. 

I personally would love to try one on my own rig, but funds are a tad tight right now, but also, I would need a PCIE ribbon to extend one of the covered slots... as I am currently completely out of available PCIE slots.
 
Please let us know your results.

CSPlayer089
Just bought a 400GB 750 a few days ago. It should arrive soon. I'll post my experience installing it on my X79 Dark in the coming days. 

what cpu are you going to use with it?

edit : i am using 3930k and thats why i am so concerned about it :(

4820K

I got a samsung 951 ahci (double verified it!), and an adapter board from addonics.
Did the bios settings as posted earlier by crosshairdon.
But the drive is not recognized as bootable drive in any pci-e slot.
Also, I updated the bios to the latest version before I started rebuilding.
 
Now I have the samsung in the 8x slot right beneath the primary x16 graphics slot.
Win 8.1 sees it perfectly as ahci drive.
Win 10 setup sees it as a viable installation media.
Except booting from it seems impossible.
 
Any suggestions?
 

Installed my 750 400GB without a hitch. Plugged in the drive in the 2nd to last PCI-e slot, shows up in BIOS at 3.0/x4. Booted from UEFI Windows 10 USB installer without a hitch. Zero issues. 2100 read, 900 write per CrystalDiskMark. 

Thank you. I'm going to 750.

Well .. got me an Intel 750 after de 951 did not came up as bootable device.
No luck.
The 750 does not boot, nor does it show as bootable option.
 
Questions:
Where does the bios show pci-e devices? ... running v2.13 does not seem to have that option.
Wich settings should work?
 
I did set bootoption and storage option rom to UEFI.
 

PCI-e devices are shown at the top of the BIOS screen. You need to make sure you have Gen 3 enabled for all the PCI-e slots, and make sure that CSM is set to disabled.