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Dell Performance Laptop with Serial Port: Dell D830 15.4 inch Wide Screen, Faster Intel Core2Duo 2.5Ghz, 4G RAM, 320G drive, SerialPort RS232 9pin, nVidia Quadro NVS 3D 128M VRAM, Advance Wireless Internet, Windows 7 Pro or Windows XP pro, Very Durable. - Click Close to Close