PCIe4.0 x16 1-to-2 expansion/gen3GEN4/ X8X8 with clock split IC

PCIe4.0 x16 1-to-2 expansion card gen3GEN4 split card X8X8 with clock split IC. Motherboard BI0S support to change PCIE working mode to X8X8 is required. PCIEX16 split X8X8, SATA-powered version. Motherboard BI0S support to change PCIE working mode to X8X8.