4GB 2x 2GB DDR2 PC 4200 LOW DENSITY PC2-4200 533 MHz Desktop Memory RAM Non-ECC - Walmart.com
2GB 2X1GB RAM Memory for LG LW Series LW40-J4MB Black Diamond Memory Module DDR2 SO-DIMM 200pin PC2-4200 533MHz Upgrade System Specific Memory - Newegg.com
4200MHz RAM vs. 3600MHz vs. 3000MHz (Ryzen 3000 Series) - YouTube