Need help with PCIE Lanes

You sure? Their product page says:

1 x PCI Express x16 slot, running at x16 (PCIEX16)
* For optimum performance, if only one PCI Express graphics card is to be installed, be sure to install it in the PCIEX16 slot.

1 x PCI Express x16 slot, running at x8 (PCIEX8)
* The PCIEX8 slot shares bandwidth with the PCIEX16 slot. When the PCIEX8 slot is populated, the PCIEX16 slot operates at up to x8 mode.

1 x PCI Express x16 slot, running at x4 (PCIEX4)
* The PCIEX4 slot shares bandwidth with the M2P_32G connector. The PCIEX4 slot operates at up to x2 mode when a PCIe SSD is installed in the M2P_32G connector.

3 x PCI Express x1 slots
* The PCIEX1_3 slot shares bandwidth with the SATA3 1 connector. The SATA3 1 connector becomes unavailable when the PCIEX1_3 is populated.

(All of the PCI Express slots conform to PCI Express 3.0 standard.)

/r/buildapc Thread Parent