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Topic:

On a board msi x470 gaming pro carbon 2 pieces m.2 samsung 970 pro on 500 MB everyone are installed, but the test of speed shows on m.2_1 predictably 3500 Mb/with reading, and here on m.2_2 only 2000 Mb/with. Google and the user guide did not answer how to adjust . Tried to replace PCIe x16 on PCIe x4+x4+x4+x4, but speed to 3500 did not rise.
Is  ASUS PRIME x370-A, in it 2 pieces m.2 samsung 970 pro on 500 MB are similarly installed and in the beginning there was 1-v-1 a same situation, but there I through adjustment  delivered instead of SATA mode PCIe and all earned - both ssd now give 3500 Mb/with on reading.
QUESTION: whether there is "an artful" option in msi x470 gaming pro carbon which allows m.2 to receive from the second card declared by the vendor ssd characteristics? Thankful in advance for your answers!!!
Adding from 8/17/2018 16:59:
There is an assumption that one connector m.2 on board PCIe 2.0 x4, and PCIe 3.0 x4 and a connector with PCIe 2.0 x4 cuts off the second speed to 2000 Mb/with. Whether so it?

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bns
There is an assumption that one connector m.2 on board PCIe 2.0 x4, and PCIe 3.0 x4 and a connector with PCIe 2.0 x4 cuts off the second speed to 2000 Mb/with. Whether so it?
https://www.msi.com/Motherboard/X470-GA … cification
DETAIL
Adding from 8/18/2018 09:51:
[off] And in what tasks at you such speeds are defensible used? [/off]