For sale is a HP Z Turbo Drive Quad Pro, 2 x 512GB (1TB) PCIE SSD drive! New and unused pulled from my workstation - changing to network RAID. 
 
HP part number: N2M99AA

The HP Z Turbo Drive Quad Pro enables up to four M.2 PCIe SSD modules to be connected to one PCIe Gen3 x16 slot. This M.2 form factor device uses PCIe Gen3 x4 which enables sequential performance levels greater than 2GB/s for each module. The devices can be set up with RAID for additional performance and redundancy using software RAID.  

512GB M.2 PCIe SSD (NVMe) 

Capacity:                              512GB M.2 PCIe SSD (NVMe) 
Interface:                              PCIe Gen3 x16 architecture NVMe Controller 
NAND Type:                         MLC 
Read Bandwidth (128KB):   2150 MB/s 
Write Bandwidth (1MB):       1550 MB/s 
Random Read IOPS (4KB): 300K 
Random Write IOPS (4KB): 100K 
Endurance (Total Bytes Written): 292 TB