HP 805667-B21 COMP 4GB DDR4-2133MHZ ECC SRX8 UDIMMAddOn 4GB DDR4 SDRAM Memory Module 4 GB (1 x 4GB) DDR4 2133 PC4 17066 DDR4 SDRAM 2133 MHz Single rank Memory CL15 1. 20 V ECC Unbuffered 288 pin DIMM Lifetime Warranty VPN: 805667 B21 AM SKU: RSC386602 UPC: 821455545584 4 GB of memory to heighten your computer's performance 2133 MHz of memory speed skillfully manages the variety of apps and computational tasks 288 pin pin DDR4 SDRAM interface synchronizes electrical and clock signals for an efficient