The HMA84GR7JJR4N-WM is a server memory module from SK Hynix, specifically a DDR4-2666 RDIMM. This module has a capacity of 32 GB, operates at a speed of 2666 MT/s, and features ECC 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.