Missing heatsink. The Dell DPWC400 QUAD M.2 PCIe Solid State Drive Storage Adapter Card is a high-performance accessory designed for computers that lack sufficient storage capacity. With four M.2 PCIe ports, this adapter card allows for the easy installation of multiple solid-state drives to enhance system speed and efficiency. The high-profile form factor makes it compatible with standard PCI slots, providing a reliable solution for expanding storage capabilities in a variety of computer systems. Made by Dell, a trusted brand in the industry, this SSD enclosure is a dependable choice for users looking to upgrade their storage system.