Hmmm, I'm not so sure downloading the drivers from the Zotac website was the difference, the link on the Zotac website actually directs the download to download the drivers from NVidia (the link below is the address the Zotac "button" downloads the driver from), it's more likely that the first couple of attempts didn't fully install for reasons unknown.
(It is also the same address that NVidia badged graphics cards use for the latest Win10 x64 drivers.)"http://us.download.nvidia.com/Windows/388.13/388.13-desktop-win10-64bit-international-whql.exe"
Zotac do actually recommend downloading the latest drivers from NVidia, the following quote is a copy and paste from the Zotac Quick Installation Guide for John's card:
Quote:
Updating the Graphics Card Driver
The installation driver CD that
came with your VGA card is the
latest driver available at the time
of manufacturing. However, these
drivers are updated frequently.
Updating to the latest version of
the VGA card driver may improve
its performance. Checking the
NVIDIA website from time to time is
recommended to see if a new driver
is available:
http://www.nvidia.com.
Source:
https://www.zotac.com/download/mediadri ... nstall.pdfA moot point if all is working though