m.2x4

My board is Asus z170a, graphic card is gtx1070, osx 10.13.2. WebDriver-378.10.10.10.25.102. They worked well until I installed a m.2 nvme device. The graphic driver changed to osx default from web driver. I checked bios status, gtx1070 pcie speed changed to x8 from x16. and nothing else was...

Hello, Is there any _proven_ Socket 1150 with M.2x4 support and EFI boot available except ASRock Z97 Extreme6? I have ASRock Z97 Extreme6 with SAMSUNG m.2x4 256GB / YOSEMITE. OSX works, but it only boots from regular SATA HD or USB 2.0. This motherboard acts so weird when a) booting into BIOS...