Marpet XTra RAM Deluxe 4MB upgrade for my Atari STFM. Turning it into a 4160STFM. - YouTube
Atari 400/800 16K RAM PCB Tested Working In Plastic Case | eBay
Ram It (1983) - MobyGames
Playing Atari on RAM with Deep Q-learning - deepsense.ai
Amazon.com: Atari Ultimate Arcade Fightstick USB Dual Joystick with Trackball 2 Player Game Controller Powered by Raspberry Pi 3B+ 1GB RAM 32GB Micro SD Card Preloaded Over 100 Classic Atari Games :
48k Memory Upgrade Board for the Atari 400 from 5cfab on Tindie
Atari 800 48k RAM Card with Jumper Board from 5cfab on Tindie
64k Memory Upgrade For the Atari 600XL from 5cfab on Tindie