The manual states support for PCIe 4, but isn't clear on whether two of them will work together (I suspect they share a PCIe channel) -- or whether one is 4 and the other is 3. If you're installing a PCIe 4 drive, replace the original with that and move the existing one to the other NVMe connector.   M.2 2230, Class 35 solid-state drive PCIe NVMe 3x4 Up to 1 TB M.2 2280, Class 40 solid-state drive PCIe NVMe 3x4 Up to 1 TB M.2 2280, Class 40 solid-state drive PCIe NVMe 4x4 2 TB M.2 2280, QLC solid-state drive PCIe NVMe 3x4 Up to 1 TB  
HI, There are two m.2 nvme slots in Vostro 5510. Does Vostro 5510 has  nvme 4.0 slot available? I'm interested in upgrading to Samsung 980 PRO drive. thank you Branislav    
Vostro 5510 nvme 4.0 ssd upgrade Samsung 980 pro