pcie slot restrictions and vrm question - PC parts

pciex1_1 slot   Dan alibaba 88 slot

2 slot I have this slot populated with an Intel 600p NVMe 2 Socket 3 shares bandwidth with PCIEx1_1 and PCIEx1_2

When the PCIEX1_1 slot or the PCIEX1_2 slot is populated with an expansion card, the PCIEX4 slot will operate at up to x1 mode GA-P67A-UD7 1) 2 Having read about the possible problems with on-board USB I purchased the recommended Inateck PCIe card, which I've installed in the top expansion slot

tiger gaming poker PCIe cards can always operate in PCIe slots with the same or more lanes than the card For example, an x8 card can operate in a slot with x8, x16, or x32 lanes  The web summary says that PCIEX1_2 slot, PCIEX1_1 slot and PCIEX16_2 slot share bandwidth but nothing beyond that, and the manual says nothing