How much can I upgrade my Dell Optiplex 780 SFF for gaming? - Quora
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Amazon.co.jp: Dell Optiplex 780 Small Form Factor SFF Desktop Business Computer PC (Intel Dual-Core Processor up to 3.0GHz, 8GB DDR3 Memory, 750 GB HDD, DVDRW, Windows 7 Professional) (Certified Refurbished) [並行輸入品] :