Micron 8GB (1x8GB) 2133Mhz Pc4-17000 Memory. Micron is a memory module that is designed to improve the performance of servers and workstations. This memory module is equipped with advanced technologies that ensure fast and reliable performance. The CL15 indicates the latency of the memory module, which is the delay between a command and the response. The lower the latency, the faster the memory module responds to commands.