Dell Optiplex 7040 Small Form Desktop, Intel Quad Core i5 6500 3.2Ghz, – Deluxe PCs
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Dell Optiplex 7040 small form factor teardown and system overview - YouTube
Used Dell Optiplex 7040 SFF Desktop, Intel Core i5 6500 3.2Ghz, 16GB DDR4, 2TB HDD, HDMI, DVD, Windows 10 Pro - Walmart.com
Dell OptiPlex 7040 Series (SFF) Review - StorageReview.com