The HMA84GR7CJR4N-VK is a server memory module from SK Hynix, specifically a DDR4-2666 RDIMM (Registered DIMM). This module has a capacity of 32 GB, operates at a speed of 2666 MT/s, and features ECC (Error-Correcting Code) for increased reliability in servers and workstations. The module uses a voltage of 1.2 V and is designed for use in demanding environments such as data centers and enterprise IT infrastructure.