My cards are 4GB. i bought the cards for 300$ each.
The driver supplied in the original thread is for the P106 only the files are not modified for the P104. I have modified the .inf files to support the P104-100 cards.
I had to use 416.34 as the newest version of driver from nvidia wouldnt install with my .inf files. I presume because the latest version drivers dont support the mining cards.
Currently selling some if anyones interested: https://vancouver.craigslist.org/van/sop/d/vancouver-evga-pmining-edition/6795292016.html https://vancouver.craigslist.org/van/sop/d/vancouver-pgb-gtx-1070/6795291514.html
As for the video you posted. The games will work but you need to switch back on driver enforcement AFTER you install the unassigned driver. DX9 games are not supported though.