Corsair CMY8GX3M2A2400C11 Vengeance Pro 8GB 2 x 4GB DDR3 2400MHz C11 Memory Kit 1.65V at Amazon.com
G.SKILL Ripjaws X Series 8GB (2 x 4GB) DDR3 2400MHZ Desktop Memory Model F3-2400C11D-8GXM 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