OWC Accelsior 8M2 4TB PCIe RAID Card - 26 GB/s on the cheap
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Amazon.com: Sedna - PCIe 4X - Quad 2.5 Inch SATA SSD RAID Controller Card ( RAID 0/1/10) Marvell HyperDuo Technology (with Built in Power Circuit, no Need SATA Power Connector) (SSD/HDD not Included) : Electronics
NEW PIC-E 4.0 X16 to M.2 NVME 4 Ports SSD Raid Expansion Card Adapter 4 x 32Gbps | eBay