M.2 SSD RAID0でスピードテストをしてみたところですが、約5000MB/s。まずまず早いかなーという印象です。6000近く行って欲しかったところですが・・・。

Whether you have the Mac Pro 2019, a Mac Pro 2012 or 2010, or PC tower, Accelsior 4M2 can go to work for you. As a half-length x8/x16 compatible card, this game-changer offers the versatility you need so you’re not tied to one slot size or limited by a space-confined computer case. You can also enjoy the performance boosting benefits of Accelsior 4M2 with your Thunderbolt 3-equipped notebook computer, iMac workstation, or slot filled gaming rig. It’s plug and play easy with a PCIe expansion chassis like the OWC Mercury Helios 3s (sold separately).4 Helios 3S lets the Accelsior 4M2 flow with your workflow by offering up to 2,500MB/s real-world read/write performance in the field on your notebook.5 Once back at your desk, the choice is yours…keep Accelsior 4M2 in the Helios 3S or install it into your Mac Pro 2019 to enjoy its blistering fast 6,000MB/s capabilities.