The fastest Thunderbolt 3 enclosure for four NVMe cards in JBOD?

The OWC Express 4M2 does not use a PCIe switch and splits up the 4 x If you plug the Accelsior 4M2 card into a PCIe 2 x8 PCIe electrical slot

Express 4M2 is connected to your Mac or PC This enclosure has four slots for NVMe SSDs that you can install using a screwdriver The box's

prograde digital cfexpress type b & uhsii sdxc dualslot usb 32 gen 2 card reader OWC EXPRESS 4M2 4-SLOT NVME SSD ENCLOSURE This item will ship once it's back in stock

what is an m2 slot I just bought an OWC Express 4M2 storage with 2 1TB WD_BLACK SN850 NVMe disks OWC 4-bay enclosure Four identical Seagate 8TB drives