PCI Express x4 network card into PCI-Express x16 slot?

PCIe x4: This slot has four lanes for data transfer It provides more PCIe x16: This is the largest PCIe slot with 16 data lanes PCIe x16 slots

1 PCIe x16 slot; 4 SATA3, 2 x ; Graphics Output Options: HDMI & Display ; 1 Rear USB Gen2x2 Type-C, 1 Rear USB Gen2 Type-A

pcie 20 x16 slot PCIe x4 devices are compatible with larger PCIe slots such as x8 and x16, and can be installed in these slots as well However, the bandwidth of the device is

pcie 8x slot I have recently bought a B450 mobo, and it comes with CrossFire support The thing is, only one of the PCIe slot is x16, the other one is x4 I have a