G.Skill RipJaws V 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-32GVK at Amazon.com
G. Skill F4-3200C16D-16GTZSW Trident Z DDR4-3200MHz CL16-18-18-38 1.35V 16GB (2x8GB) at Amazon.com
G.Skill Trident Z Neo F4-4000C16D-16GTZNA memory module 16 GB 2 x 8 GB DDR4 4000 MHz | Dodax.com
G.Skill Trident Z Royal Series - DDR4-16 GB: 2 x 8 GB - DIMM 288-PIN - ungepuffert at Amazon.com
HyperX Predator DDR4 RGB 16GB Kit of 2 (2 x 8GB) 4000MHz CL19 DIMM XMP RAM Memory with Infrared Sync Technology (HX440C19PB3AK2/16) at Amazon.com
G.Skill Trident Z Royal 16GB DDR4 4600MHz Memory Module (16GB, 2x8GB, DDR4, 4600MHz) at Amazon.com