Western Digital has announced two new high performance NVMe PCIe 3D NAND SSDs, the fast PC SN720 and the compact PC SN520. The drives are available in capacities of up to 2TB for the SN720 and up to 512GB for the SN520. 
The PC SN720 is Western Digital's flagship model, it uses the PCIe X4 interface and will be available in capacities of 256GB, 512GB, 1TB and 2TB. Western Digital specifies maximum sequential read speeds of up to 3,400MB/s and maximum sequential writes of up to 2,800MB/s. Random reads are specified at a maximum of 500,000 IOPS and random writes at a maximum of 400,000 IOPS.
The PC SN520 is more compact and uses the PCIe X2 interface. It's able to perform sequential reads at a maximum of 1,700 MB/s and sequential writes at a maximum of 1,400MB/s. Random reads are specified at a maximum of 270,000 IOPS and random writes at a maximum of 280,000 IOPS. The drive will be available in fewer capacities than the SN720, Western Digital lists the drive in capacities of 128GB, 256GB and 512GB and in the M.2 2242 and M.2 2230 form-factor.
Regarding availability, Western Digital only mentions the SSDs are currently sampling with selected customers. The company also hasn't disclosed any pricing information.
