Amazon.com: Dell Optiplex 980, Intel Core i5 3.2-GHz, 8 gb Ram, 500 GB Hard Drive, DVD Drive, WiFi, Windows 10 Professional Pro (Renewed) : Electronics
4GB Dell Optiplex 980 RAM Upgrade
Dell OptiPlex 980 DT – Specs and upgrade options
8GB (2X4GB) Memory Ram Compatible With Dell Optiplex 980 Ddr3 Dimm By CMS A69 - Computer Memory Solutions