G.SKILL 16GB (2 x 8GB) Trident Z Royal Series DDR4 PC4-35200 4400MHz Desktop Memory Model F4-4400C18D-16GTRG at Amazon.com
Thermaltake TOUGHRAM RGB DDR4 4400MHz 16GB (8GB x 2) 16.8 Million Color RGB Alexa/Razer Chroma/5V Motherboard Syncable RGB Memory R009D408GX2-4400C19A at Amazon.com
Patriot Viper 4 Blackout Series DDR4 16GB (2 x 8GB) 4400MHz Kit at Amazon .com
G.Skill Trident Z NEO Series 32GB (2 x 16GB) 288-Pin SDRAM DDR4 4000 (PC4-32000) CL18-22-22-42 1.40V Dual Channel Desktop Memory Model F4-4000C18D-32GTZN at Amazon.com