CMS 8GB (1X8GB) DDR3 12800 1600MHz Non ECC DIMM Memory Ram Upgrade Compatible with Dell® Optiplex 3020 Destktop - A64 at Amazon.com
How to upgrade the DELL 3020 Memory (RAM) - YouTube
Dell Optiplex 3020 MTW,Intel Core I5-4590 3.3GHz , 16G RAM, 256G SSD + 1T WIFI , BT , DVD ,VGA/DP, Windows 10 Home 64 bits Multi Language Used Grade A - Walmart.com