The HMA84GR7AFR4N-VK is a 32GB DDR4-2666V server memory module, with a 2RX4 configuration and ECC REG. This means the module features error-correcting code (ECC), which helps detect and correct memory errors, and it is registered (REG), designed specifically for server environments where stability and reliability are essential. The memory speed is 2666 MHz, and it uses the PC4 memory protocol, making it suitable for high-performance tasks in demanding server applications. The module is intended for use in systems that support a 2Rx4 memory configuration, referring to the distribution of memory chips on the module.