SN750 PCIe 4x but 5 GTS only

Understanding the Compatibility of PCIe 4 Graphics Cards in PCIe 3 Slots · 1 Bandwidth Limitations: A PCIe 3 slot offers half the bandwidth of a PCIe 4 slot,

Answer Make certain that you have updated your GEN 3 capable motherboard with the latest Motherboard BIOS and set the PCIe slot to the appropriate speed, not

pcie 4 slot 3 Slot x16 Gen4 PCI Express Backplane Dolphin's IBP-G4X16-3 three slot backplane enables customers to establish a remote access to two PCIe devices

pcie cem slot Most commonly, PCIe expansion slots are used for the add-in graphics card, SSD storage devices, Wi-Fi adapters, and other sorts of expansions