Motherboards: Socket to PCI-Express 4x Slot Converter

PCIe Gen 4 vs Gen 3 Slots, Speeds 4x pcie slot Most of the time it works fine but some mainboardvideo card combos won't see a 16x card in a 1x or 4x slot due to the PCIe presence detect not 4x4bet slot Upstream port: PCIe x8 Edge Finger · Downstream port: Two Internal PCIe Cable Port · PCI Express Switch: 16-Lane, 5-Port PCIe Gen 3

4x4 slot pg PCI-e 1X4X Open Back Card to M Key 4 Lane PCIe Slot Adapter Micro SATA Cables PN # M2-921-1X4X