Slow M.2 SSD

Oct 5, 2018
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HI,

I have a Gigbyte GA-Z97X_UD5H Motherboard, Samsung EVO 850 plugged into the Sata Express port, and I have just installed the Samsung 970 Evo NVMe M.2 into the motherboard. I ran the samsung magician utility and while I am seeing fast read/write times for the 850, about 5200/4480 the 970 is only clocking about 830/800. Does anyone have an idea about how I can address the slow speeds?