G.SKILL 32GB (4 x 8GB) TridentZ RGB Series DDR4 PC4-32000 4000MHz for Intel Z370 Desktop Memory Model F4-4000C18Q-32GTZR - Walmart.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
CORSAIR VENGEANCE PRO 16 GB (2PK x 8GB) 4000MHz DDR4 C18 DIMM Desktop Memory with RGB lighting Black CMW16GX4M2Z4000C18 - Best Buy