Corsair VENGEANCE LPX DDR4 RAM 32GB (2x16GB) 3200MHz CL16 Intel XMP 2.0 Computer Memory - Black (CMK32GX4M2E3200C16) at Amazon.com
32GB Kit 2x16GB DDR4-3200 PC4-25600 ECC 2Rx8 Unbuffered Server Memory by NEMIX RAM at Amazon.com
Amazon.com: OWC 32GB (2 x 16GB) PC19200 DDR4 2400MHz SO-DIMMs Memory Compatible with Mac Mini (Late 2018), 27" and 21.5" iMac (Mid 2017), and Compatible PCs (OWC2400DDR4S32P) : Everything Else
VENGEANCE® RGB PRO 32GB (2 x 16GB) DDR4 DRAM 3600MHz C18 Memory Kit — Black