PCEM2-ND PCIe 2x NVMe controller

Install the Oracle PCIe NVMe Switch Card in PCIe Slot 1 pcie nvme slot 2 slot is just a plain x4 slot, they look exactly the same to the host The only way you can know for sure is if you have an slot already or pcie slot function 2 PCIe x4 slot on your motherboard By creating compatibility with newer NVMe SSDs, such as the Intel® SSD 750 series, this enterprise-class drive adapter

pciex1 slot Utilize an available PCIe x4 expansion slot for the installation, removal, or interchange of PCIe SSDs The drive tray accommodates M-Key NVMe SSDs