[NAME]​  You have a few paths to use nvme drives.  1) you can use pci-e adapters ( there are adapters for up to 4 nvme drives, to install in a spare 16x slot ) 2) you can use 2 of the flexbays ( if those 2 bays were or are converted to U.2 / M.2 usage ) The Vroc and the megaraid controllers are to handle raid, but they are not required to use nvme drives.  
Hello all,   I have a Dell Precision T5820 (2021 production) workstation that I am building up. It didn't come with drives and based on the build sheet, it came with at least 2 SSD SATA drives. I'm looking to get the base case scenario using NVME drives with a MEGARAID controller but I am confused on the drive types it supports.  They make an NVME drive cage, with literal M.2 drives in the bays. They also make GEN4 NVME drives that have the typical 2.5" form factor. Do I require the MEGARAID to use the GEN4 or can the SATA connections be enough to use those types of drives? I don't mind adding the RAID controller, but it would be less cost and messing around if I can avoid that and use the 2.5" NVME drives.   Thanks! 
Precision T5820 Workstation Drive Bay / LSI / NVME