how do you use this -vmt1 -vmt2 -vmt3 -vmr -nvmem?

i'm using Nvidia GTX 1080 TI, with GDDR5X VRAM, so i guess -nvmem 2 is correct? i tried, but it still gives 30 mh/s. should be around 50 mh/s if it is configured correctly, right?