DELL Desktop PC OptiPlex 3020 Intel Core i5 4th Gen 4590 (3.30 GHz) 8 GB DDR3 1 TB HDD Intel HD Graphics 4600 Windows 7 Professional 64-Bit with Windows 8.1 Pro License - Newegg.com
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Amazon.com: DELL Optiplex 3020 SFF Desktop PC - Intel Core i5-4570 3.2GHz 8GB 500GB DVDRW Windows 10 Professional (Renewed)'] : Electronics
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The Ultimate Low Cost Big Sur Hackintosh - Core i5 Dell Optiplex 3020 SFF | tonymacx86.com
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