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Dell OptiPlex 990 Tower Computer PC, 3.40 GHz Intel i7 Quad Core Gen 2, 8GB DDR3 RAM, 500GB SATA Hard Drive, Windows 10 Home 64 bit (Renewed) | StackSocial
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Amazon.com: DELL Optiplex 990 Tower High Performance Business Desktop Computer, Intel Quad Core i5 up to 3.4GHz Processor, 8GB RAM, 2TB HDD, DVD, WiFi, Windows 10 Pro 64 Bit(Renewed)'] : Electronics
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Refurbished: Dell Optiplex 990 SFF - QUAD CORE Intel i5-2400 - 1TB 7200RPM HDD - 8 GB DDR3 RAM - WiFi - Dual Video Output - DVD-RW - Windows 7 Pro 64- Bit Operating System - Newegg.com
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