GTX1060 PCIe x16 Gen3 @ Gen 1.1?

Oct 24, 2018
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I have Gigabyte H310m S2P Motherboard. (i5 8400 8GB Ram and GTX1060 3GB).
In GPU-Z it says my GPU is PCIe Gen3.0 @ PCIe Gen1.1.
But MB Specifications shows it supports PCIE Gen3.0.
checked the Gigabyte GPU info panel. It shows the same thing as GPU-Z. Every Game i checked runs at Ultra setting at stable 60fps (1080p). (Exept No mans Sky). So far i dont have any GPU Performance problem.
Is this a problem?