HyperX HX421S13IBK2/16 is a kit of two 1G x 64-bit (8GB) DDR4-2133 CL13 SDRAM (Synchronous DRAM) 2Rx8, memory modules, based on sixteen 512M x 8-bit DDR4 FBGA components. Total kit capacity is 16GB. Each module kit supports Intel Extreme Memory Profiles (Intel XMP) 2.0. This module has been tested to run at DDR4-2133 at a low latency timing of 13-13-13 at 1.2V.