What Is a PCIe SSD, and Do You Need One in Your PC?
Amazon.com: Sedna PCI Express (PCIe) SATA III (6G) SSD Adapter with 1 SATA III Port (with Built in Power Circuit, no Need SATA Power Connector, Best for Mac), SSD not Included :
PNY CS3030 - Solid state drive - 2 TB - internal - M.2 2280 - PCI Express | Dell USA
M2 Nvme Ssd Ngff To Pcie 3.0 X16 Adapter M Key B Key Msata Pci Express 3.0 Nvme M.2 Ssd & M.2 Ahci & Msata 3 In 1 Converter - Add On