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Best graphics card for an Optiplex 780? - Dell Community
Dell OptiPlex 780 Small Form Factor - iFixit
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Dell Optiplex 780 SFF PC Intel Core 2 Duo E8400 3.0GHz 8GB RAM 1TB HDD Win10 Pro | eBay
Amazon.com: Dell Optiplex 790 Desktop High Performance Desktop Computer Intel Core i7-2600 Processor 3.8GHz 8GB RAM 2TB HDD DVD Windows 10 Pro 64bit (Renewed) : Electronics