i7 6700 (non-K) Sierra - unknown CPU model

Hi everyone.
I come here today as a last resort.
I am trying to get Sierra working nicely on my PC but this has been quite a handful issue.
This is my build today:
MoBo: Asrock H170 Pro4
CPU: i7 6700 (non-K)
RAM: 8GB DDR4 Crucial - Single Channel
Graphics: 2GB AMD Radeon R7 200 Series
HDDs: 1TB Seagate | 2TB WD Caviar Green
SSDs: 120GB Corsair Force 3 (Windows 10 already installed) | 120GB Kingston HyperX (Sierra already installed)

The problem:
I am only able to install Sierra if I boot...

i7 6700 (non-K) Sierra - unknown CPU model