HP 840760-191 COMP 128GB DDR4-2666MHZ ECC ORX4 LRDIMMAddOn 128 GB DDR4 SDRAM Memory Module 128 GB (1 x 128GB) DDR4 2666 PC4 21300 DDR4 SDRAM 2666 MHz Octal rank Memory CL17 1. 20 V ECC 288 pin LRDIMM Lifetime Warranty VPN: 840760 191 AM SKU: RSC911877 UPC: 821456133902 LRDIMM 128 GB of memory to maintain symmetry with processor and hard drive and bring out the ultimate computing experience 2666 MHz of memory speed with CL17 latency skillfully manages the variety of apps and computational tasks 288 pin