In reply to Moridin.

Got an OCZ RD400 m.2 SSD (w/ Addonics PCIE 3.0 4x adapter) last week for my Z97 hack and it works OOB with 50%+ more performance:

http://imgur.com/a/bmycB

It's NVMe but if you set the LBA sector size from 512 bytes to "Advanced Format" 4k [need to create a bootable linux drive utility from OCZ's SSD Utility Windows app to do this] Apple's NVMe driver is happy with it.

Also, now that nvidia is supporting macOS again my GTX 950 card ($100 refurb from NewEgg) is driving my 2 4K 24" Samsung displays (2 x $200 from NewEgg Black Friday) great.