Let's get right to it.

I'm attempting to build a second OS drive where I can have Yosemite or El Capitan and use Final Cut or iMovie because of the background rendering. I have a GTX 1070 as my main GC, but from what I understand I can't use the 1070 in the system (when I have tried to boot it just stops and gives me a blank grey screen when booting with the flags: -v -x.

So what GC can I get that I can just slap in there that is cheap. I don't care if it's great. On that note tho, is there support for the RX...

Let's get right to it.