GTX 670 premier pro cuda support

I no that the gtx 670 isn't officially supported for cuda on  adobe premier pro cc, but i heard on a tek syndicate video that there was some sort of hack to get cuda working. If this is true can someone tell me how to do it. Because I'm building a PC for around $1200 and I'm going to be editing video and a little gaming and i really want to use nvidia shoadowplay and i cant afford a 680 so this card looks like my only option.

all you have to do is edit a text document, there are lots of youtube vids showing how here's but one

for the actual tut start about 0:45