WOW! Did you try Win 10? You can still get it free since you own Win 7 and 8. They still give it away for free if you do it right.

http://www.zdnet.com/article/heres-how-you-can-still-get-a-free-windows-10-upgrade/

I run Win 10 Home on a 6 R9 390 OC Nitro+ rig with ZERO ISSUES and MAX HASH.