Sonnet 8x4 Silent Gen4 PCIe Card

How much performance loss will I do if I use a PCIE 4 supported pcie 4 slot PCIe x4: This slot supports four lanes of data transfer, providing higher bandwidth than the PCIe x1 slot It is commonly used for storage devices such as SSDs pcie 40 in 30 slot In ASUS 「PCIe x16 Slots - 4」

pcie m2 slot SuperSpeed Storage：PCIe x4 Connector; EZ-Latch：PCIe x16 Slot with Quick Release Design; Fast Networks：GbE LAN; Extended Connectivity：DP, HDMI; Smart