PCIe x4 into x16, but what about the transfer speeds?

pcie x4 in x16 slot   Dan pcie slot dimensions

All of them have great bifurcation abilities on the CPU itself, which is also documented AMD chips can split each PCIe Gen5 x16 bus into as

Côté PCIe, nous avons un premier slot en x16 ainsi que deux en PCIe x4 et un dernier en PCIe x2 Côté Ethernet, nous avons 1 x PCIe x16 slot Intel® B760 Chipset 1 x PCIe x16 slot 1 x PCIe x1 slot

fish slot game png View Jetson Orin Technical Specifications ; CSI Camera, 16-lane MIPI CSI-2 connector ; PCIe*, x16 PCIe slot supporting x8 PCIe Gen4 Key M slot with x4 PCIe 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