G.SKILL 16GB (2 x 8GB) Trident Z Royal Series DDR4 PC4-32000 4000MHz Desktop Memory Model F4-4000C15D-16GTRG at Amazon.com
Thermaltake TOUGHRAM RGB White DDR4 4000MHz 16GB (8GB x 2) 16.8 Million Color RGB Alexa/Razer Chroma/5V Motherboard Syncable RGB Memory R022D408GX2-4000C19A at Amazon.com