Hi, the information here is incorrect. It is a PCI Gen 3 card. Not 4.0 as stated. PCIe® Gen3 x8 https://documents.westerndigital.com/content/dam/doc-library/de_de/assets/public/western-digital/product/internal-drives/wd-black-ssd/data-sheet-wd-black-an1500-nvme-ssd.pdf