G.SKILL 64GB (8 x 8GB) Ripjaws V Series PC4 32000 4000MHz 288-Pin SDRAM DDR4 Desktop Memory Model F4-4000C15Q2-64GVK at Amazon.com
G.Skill Announces DDR4-4800 and DDR4-4500 Kits for Z390 Boards
Amazon.com: G.SKILL 64GB (4 x 16GB) Ripjaws V Series DDR4 PC4-22400 2800Mhz For Intel Z170 Platform Desktop Memory Model F4-2800C15Q-64GVR : Electronics
G.SKILL Trident Z Royal Series 32GB (2 x 16GB) 288-Pin DDR4 SDRAM DDR4 4800 Intel XMP 2.0 Desktop Memory Model F4-4800C20D-32GTRG - Newegg.com
G.Skill Trident Z Royal Series - DDR4-16 GB: 2 x 8 GB - DIMM 288-PIN - ungepuffert at Amazon.com