Windows 10 1709 (build 16299.248)
3x nVidia 1070 Ti @ 100% PL, +200 core, +700 memory
Biostar 250-BTC
4gb ram
80gb page file
With 388 this worked just fine with no errors.
Jumping to 390 this causes errors. Even at 70% PL same thing. I had to drop it down to 50% and only then it would not cause that error. So I downgraded back to 388 drivers and run at 100% PL right now until we can debug it?
I don't know if I will be able to debug such problem. Don't you think that +200 core + 700 mem is too much for your gpu? Have you tried to reduce overclocking with 390.77 drivers?