Startechcom pci express x1 to low profile x16 slot extension adapter this pcie x1 to pcie x16 slot extension adapter provides enhanced compatibility between motherboards and a variety of pci express expansion cards allowing you to install a pcie card x1 x16 in an x1 slot the pci express x1 to x16 adapter accommodates low profile x2 x4 x8 x12 or x16 pci express cards eliminating the cost and hassle of upgrading a pcie card or replacing the motherboard for the sake of compatibility t