How PCIe lanes are splitted when MB supports 1 PCI x16 and 1

ADT-Link PCIe x4x4x4x4 to Expansion Card 4 m 2 pcie 4 0 in 3 0 slot 2 x16 Gen 4 Card uses PCIe , which doubles the bandwidth per lane compared to PCIe With four slots, it offers up to 256 Gbps of bandwidth per card, m2 slot They are all compatible Even a PCIe SSD will work just fine, but the speed will be limited to PCIe x4

m2 pcie 40 in 30 slot  An 2280 solid-state drive , 22 mm wide and 80 mm long Connects to, Motherboard via one of: PCIe ×4; PCIe ×4; PCIe ×4; Serial ATA