Slow NVMe speed on Mojave

Hello, I'm having troubles with my Xiaomi Mi Notebook Pro hackintosh.

My first problem is that my NVMe Samsung 960 EVO seems to run at SATA speed on write speed.

Second problem is that my laptop often shutdowns opening photoshop or tasks that require high cpu usage (also I have to say that may be a disk problem but I am unsure about that: I opened a PDF file and I noticed a noise that seemed to be produced by the NVMe disk, I made it jump a few pages very fast and It shutted down)

https://imgur.com/a1VugfJ

submitted by /u/skr33t
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