Your PSU has more than enough power. To attempt to rule out an issue with the PSU, try another set of 6-pin power connectors. If that doesn't fix it...
Did you test your RAM yet?
If you have faulty RAM, it can cause corrupted installations.
If you run the Windows Memory Diagnostic and the RAM checks out, try re-installing the Nvidia driver and trying again.
If none of this works, you have a good argument to take to EVGA.
Wow, ok, I will test all of that tomorrow.
Tnks for the answer.