ADATA Premier 8GB Single DDR4 3200MHz CL22 PC4-25600 260-Pin SODIMM Memory RAM Single (AD4S32008G22-SGN) at Amazon.com
G.Skill F4-3200C16D-16GTZR Trident Z RGB Series 16 GB (8 GB x 2) DDR4 3200 MHz PC4-25600 CL16 Dual Channel Memory Kit - Black with Full Length RGB LED Light bar at Amazon.com
Amazon.com: Patriot Memory Signature Line DDR4 8GB (1x8GB) SODIMM Frequency: 2400MHz (PC4-19200) 1. 2 Volt - PSD48G240081S : Everything Else
Amazon.com: OWC 8GB (2 x 4GB) PC19200 DDR4 2400MHz SO-DIMMs Memory Compatible with Mac Mini (Late 2018), 27" and 21.5" iMac (Mid 2017), and Compatible PCs (OWC2400DDR4S08P) : Everything Else
Corsair CMK8GX4M1A2400C14 Vengeance LPX 8GB (1 x 8GB) DDR4 DRAM 2400MHz (PC4-19200) Memory Kit - Black at Amazon.com