32GB Memory Upgrade for Early 2008 Apple Mac Pro Tower
OWC, 32GB, PC23400, DDR4, ECC, Set (2 x 16GB), 2933MHz, 288-pin, RDIMM - Tape4Backup (K&F Associates LLC)
16GB OWC DDR3 1333MHz ECC Memory Upgrade Kit for Mac Pro 8-core and Quad-core Xeon systems (4x 4GB)
OWC 32GB (2 x 16GB) PC21300 DDR4 2666MHz 260pin SO-DIMMs Memory Ram Module, Compatible with Mac Mini 2018, iMac 2019 and up, and Compatible PCs, (OWC2666DDR4S32P) at Amazon.com
How to upgrade iMac (2020) RAM and save up to $2000 - 9to5Mac
12GB OWC Memory Upgrade Kit (1 x 4GB + 1 x 8GB) 1600MHz PC3-12800 DDR3L SO-DIM | Megamac