Hackintosh poor performance in Premiere Pro 12.1

First off my system consists of this:

CPU: Core I7 8700K

RAM: 32GB 2400MHz DDR4

GPU: NVIDIA GTX 1080

STORAGE:

500GB  Crucial MX500 SSD (system and apps)

500GB Samsung 970 Pro NVMe SSD (Premiere project & content)

500GB Samsung 850 EVO SSD (scratch disk)

I have a sub 2min 4K Premiere project with little more than Lumetri colour adjustments that is taking 1 hour 45 min to export in .mp4  and I'm seeing CPU performance bounce between 20 – 30%.

I have tried Bill Gehrke's benchmarks as best I can given they're meant for PC not MAC. Unfortunately I can't create an output.csv to show exact results but it was pretty obvious it was the Disk test that was crazy slow (over 11 minutes). Bill Gehrke​

Any suggestions?