Remember the mini NVM Express drive Samsung teased during its SSD Global Summit last summer? Well, the SM951 is now in mass production—and it's very fast indeed. The four-lane PCIe 3.0 drive is rated to hit sequential speeds of 2150MB/s with reads and 1550MB/s with writes. When the drive is paired with a Gen2 interface, those top speeds fall to 1600MB/s and 1350MB/s, respectively, which is still pretty quick for an M.2 2280 gumstick.
Gen3 connectivity conveys energy efficiency benefits, Samsung says, and the SM951 also supports an ultra-low-power mode called L1.2. In this state, "all high-speed circuits" are turned off, and power consumption drops to just two milliwatts.
The SM951 is available in 128GB, 256GB, and 512GB capacities, but only to big-name system builders. Expect to see the drive tucked into high-end notebooks and workstations before too long. If its predecessor is any indication, the SM915 could eventually become available at online retailers like Newegg, as well. Fingers crossed.