What is VROC?

VROC stands for Virtual RAID on CPU. It is software that Intel originally designed with the data center in mind, but extended to their enthusiast line of products due to demand for RAID support for NVMe. Intel built VROC into their latest CPUs in order to allow consumers the option of managing RAID through the CPU. VROC allows NVMe SSDs to connect via PCIe connections and yet be directly managed on the CPU. It is used primarily to allow for NVMe RAID with NVMe SSDs on the CPU side of the motherboard. If hardware RAID is used on the chipset side of the motherboard, then it would be limited by the DMI (direct media interface) speed. Most motherboards use DMI 3.0 which has bandwidth constrictions equivalent to 4x PCIe 3.0 lanes (the same limitation on one m.2 PCIe 3.0 x4 drive. VROC allows NVMe SSDs to access formidable speeds (up to double their already fast speeds) in a bootable format. Unfortunately, VROC only supports Intel SSDs at this times, so you cannot use VROC to setup RAID with Samsung M.2 Drives.

silentpc.com

Intel® Virtual RAID on CPU (Intel® VROC)

Intel® Virtual RAID on CPU (Intel® VROC) is an enterprise, hybrid RAID solution, specifically designed for NVMe* SSDs connected directly to the CPU. Intel® VROC is made possible by the new CPU feature Intel® Volume Management Device, Intel® VMD, a new hardware architecture on Intel® Xeon® Scalable Processors. Intel® VMD enhances the 48 preexisting PCIe* lanes for dependable NVMe connections. Intel® VROC capitalizes on Intel® VMD for a simpler RAID solution that requires no additional hardware. It provides compelling RAID performance that unleashes the full potential of NVMe drives.

intel.com

Intel Rapid Storage Technology -- Wiki

en.wikipedia.org