PCIe 4.0 Card Hosts 21 M.2 SSDs: Up To 168TB, 31 GB/s | Tom's Hardware
M.2 NVME SSD PCIe 4.0 Adapter – EZDIY-FAB
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Amazon.com: AMPCOM M.2 NVME SSD to PCIe 4.0 Adapter Card, 64Gbps SSD PCIe4.0 X4 Adapter for Desktop PC, PCI-E GEN4 Full Speed : Electronics
Dual M.2 PCIe NVMe Adapter Without PCIe Splitter Function (PCIe Bifurcation Motherboard is Required), Support M.2 PCIe 4.0/3.0 SSD Soft RAID Setup in Windows/Linux
Samsung 980 PRO 2TB Internal Gaming SSD PCIe Gen 4 x4 NVMe MZ-V8P2T0B/AM - Best Buy