It's definitely cuda 9.2 with 399.24 drivers (cuda 10 is experimental and slower).
yeah, I've also tried cuda 10 with 400 drivers and h\r was a blit slower with gtx1070\1080(ti), so I rolled back to 399.24

Never thought i could reach 40mh/s but thanks to this miner it's possible.
Latest cuda/Driver
Edit stable for almost two days
Lol. Do u really think that 1080ti shows 40Mh/s on X16R. It seems that u don't know aboy this algoritm, hashes jumps from 22 to 40 on 1080ti, and on other cards too. On your screen threre are 208Mh/s, but on the bottom of screen there are only 120.
P.S. 1080ti gives about 25-27Mh/s. but not 40 as u are sure.
I know how the x16r algo works, i've tried old cuda with old drivers with trex 0.6.x max speed was 38mh/s min speed was 18mh/s
On the other hand when i tried the latest cuda with latest driver with trex 0.7.2 it's jumping from 22mhs to 40mhs