HP 840758-191 COMP 32GB DDR4-2666MHZ ECC DRX4 RDIMMAddOn 32GB DDR4 SDRAM Memory Module 32 GB (1 x 32GB) DDR4 2666 PC4 21300 DDR4 SDRAM 2666 MHz Dual rank Memory CL17 1. 20 V ECC Registered 288 pin DIMM Lifetime Warranty VPN: 840758 191 AM SKU: RSC551321 UPC: 821456133667 Whether you are playing games, using heavy loaded OS or video editing software, the 32 GB of memory will make them run in a flash 2666 MHz of memory speed with Registered signal and CL17 latency skillfully manages the variety of apps