A-Tech Ram manufacturer shows as Samsung : r/techsupport
Book Review: The Tech Phoenix by T.N. Manoharan & V. Pattabhi Ram | Book Reviews - Storizen
Amazon.com: Customer reviews: A-Tech 32GB Kit (2x16GB) RAM for Apple iMac & Mac Mini (2018, 2019 & 2020) | DDR4 2666 MHz SODIMM PC4-21300 / PC4-21333 260-Pin SO-DIMM Memory Upgrade