OWC has announced the Accelsior 8M2, a new PCIe SSD. The device supports both PCIe Gen3 and Gen4 and has a speed of up to 26,000 MB/s. This amazing performance comes at a cost of US$1,299 for the 2 TB base model and skyrockets to US$12,999 for 64 TB.
https://www.notebookcheck.net/OWC-reveals-the-world-s-fastest-and-highest-capacity-PCIe-SSD-the-Accelsior-8M2.578159.0.html