HyperX HX421C14FBK2/16 is a kit of two 1G x 64-bit (8GB) x 2 (kit for a total of 16gb)
DDR4-2133 CL14 SDRAM (Synchronous DRAM) 2Rx8, memory
module, based on sixteen 512M x 8-bit FBGA components per
module. Each module kit supports Intel® Extreme Memory
Profiles (Intel® XMP) 2.0. Total kit capacity is 16GB. Each
module has been tested to run at DDR4-2133 at a low latency
timing of 14-14-14 at 1.2V.