FOR 16GB DDR4 2666 (PC4-2666V) 1RX4 Server Memory — Compatible with 815098-B21 / 840757-091 / 850880-001

Replacement/upgrade server memory module: 16GB DDR4 running at 2666 MHz (PC4-2666V) in a 1RX4 configuration. Specifically compatible with part numbers 815098-B21, 840757-091 and 850880-001. Ideal for systems requiring the listed SKUs — same capacity, speed and rank as the original specification.