SAS to PCIe Transition: Unlocking the Power of NVMe Technology Industry Expert Blogs SAS to PCIe Transition: Unlocking the Power of NVMe Technology NVM Express Blog - By Rohit Gupta | Scott Glenn | Jimmy Gomez | Praveen Midha, Western Digital Jun. 09, 2021 ® (NVMe ®) technology is a high-performance storage protocol for non-volatile storage media directly connected to the CPU via PCI Express ® (PCIe ®) interface. PCIe architecture emerged as the next logical storage interface, following Serial Attached SCSI (SAS) and Serial Advanced Technology Attachment (SATA) interfaces, which were not designed for high-speed, non-volatile storage media. PCIe architecture slots directly connect to the CPU, providing memory-like access allowing software stacks to run more efficiently.