CMS 16GB (2X8GB) DDR4 19200 2400MHZ ECC Registered DIMM Memory Ram Upgrade Compatible with Gigabyte® Motherboard MB51-PS0 only - C121 at Amazon.com
G.Skill Trident Z RGB Series 16GB (2 x 8GB) 288-Pin SDRAM (PC4-25600) DDR4 3200 CL16-18-18-38 1.35V Dual Channel Desktop Memory Model F4-3200C16D-16GTZR at Amazon.com
parts-quick 8GB Memory for Gigabyte BRIX GB-XM1-3537 DDR3L 1600MHz PC3L-12800 SODIMM Compatible RAM at Amazon.com