Tonight I tried to flash the BIOS (6173.zip) again but it was as well
without success.
My card is a EVGA GTX 1070 SC and everything looks like it probably should.
The screen flickers and then stops again but if there should be a sucess message I don't get it.
This is what GPU-Z looks like before and after the attempt:

Additional information about my system: http:// valid.x86.fr / kx2pkg
If you need any further detail for debugging, please let me know.
Attached Image(s)
