A 16GB DDR4 ECC unbuffered memory module with dual-rank x8 configuration running at enhanced 2666 MHz for Lenovo systems. Features improved DDR4 performance with ECC error correction for data integrity without registered buffering costs. Provides substantial memory capacity with high-speed operation and error correction for reliable server applications. Designed for cost-effective Lenovo server deployments requiring ECC protection with enhanced DDR4 performance.