Dell Optiplex 980: 2.8 GHz I7 Quad-Core with Hyper Threading, 8GB DDR# RAM, 1TB HDD, ATI Radeon 4550 w/Display port, 64-bit Window 7 Professional. Dell Optiplex 980: 2.8 GHz I7 Quad-Core with Hyper Threading, 8GB DDR# RAM, 1TB HDD, ATI Radeon 4550 w/Display port, 64-bit Window 7 Professional.