Reader: DVDRW Graphics card: Integrated Operating system: Windows 10 pro Ports: 10 external USB, 4 front and 6 back. Price: $99 Dell Optiplex 990 Intel Core I5 - 2nd generation Processor: Intel Core® I5-2500 GHz 3.3GHz RAM: 4 GB Disk: 250 GB HARD DRIVE. Price: $99 Dell Optiplex 790 Intel Core I3 - 2nd generation Processor: Intel core® i3 2100 3.1GHz RAM: 4 GB Disk: 500 GB HARD DRIVE Operating system: Windows 10 pro Ports: Front USB 2, Front audio ports 2. COM 1, PS / 2 2, LPT 1, Video ports 1 VGA, Rear USB 8, RJ45 1 port, Rear audio ports 3 ports.
Dell Optiplex 790 Intel Core I5 - 2nd generation Processor: Dell 790 Intel® I5 Quad-Core de 3,1 GHz 3,1 GHz RAM: 4 GB Disk: 250 GB HARD DRIVE Reader: DVDRW Operating system: Windows 10 Ports: USB 2.0 ports quantity * 10, VGA (D-Sub) ports quantity 1, DisplayPorts quantity 1, PS /2 mouse port 2, Ethernet LAN (RJ-45) number of ports 1, Microphone, input jack Yes, Headphone outputs 2, Line Out Yes, Serial port 1.