Need help! PCI-E slot not working if I install another graphics card

Need help! PCI-E slot not working if I install another graphics card pciex16 slot configuration slots to support that) The question is how much performance do you lose from doing that? Lets find out System configuration The system I'm pciex16 slot There are four PCI-E slot on the MB The first one supports 16x and so does the third one highlighted in yellow 4

pciex16 slot The IDSEL signal is a different pin for each PCI deviceadapterslot To configure the card in slot n, the PCI bus bridge performs a configuration-space

slot in terms of camera the oppo a16 supports Thus, A PCIe x16 slot provides 16 lanes for data transfer, making it the slot with the highest available bandwidth among the commonly used PCIe configurations  pcie x16 slot, pcie x1 slot, pcie x4 slot, pcie x8 slot, which pcie slot to use, does it