HyperX HX421S13IB/8 is a 1G x 64-bit (8GB) DDR4-2133 CL13 SDRAM (Synchronous DRAM) 2Rx8, memory module, based on sixteen 512M x 8-bit DDR4 FBGA components. Each module supports Intel Extreme Memory Profiles (IntelĀ® 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.