Bifurcation x4 into two times x2

& PCIe Lane Configurations for B550 Unify Unify-X m 2 slot with pcie x4 lanes Most of those cards are x16 and their switches split to x4x4x4x4 But there are x8 cards with 4 sockets which then split to x2x2x2x2 Check m2 vs nvme slot 2 slots with x4 PCIE lanes each

m2 slot pc Now I am also using a GTX 1050 TI GPU with it So if I Install a NVME SSD, as far as I know that B450 mobo dont have its own PCIE x4