@whoololon:
Unfortunately, espinete is right again. :fuckyea:
I've been looking for something more to contribute, but the situation I found is as follows:
Apparently there are a number of users with the Samsung SSD 950 PRO M.2 on that motherboard (also with the Classified) and, to date (using BIOS v1.05), EVGA has not been able to give a satisfactory answer (it is possible to make it work afterwards as a storage unit, but not as a boot drive).
I don't know from the brevity of your message if you have managed to boot the computer and have overcome this step, if you are referring to a driver that the OS asks for when starting… what is known is that both the drivers and the latest BIOS patch are linked above. There is little more we can do.
The computer works like a rocket I assure you and I have the M2 as the boot drive and the first thing I did when I assembled it was to update the BIOS and I have been running it for a while now and without any failures of course when I have time.