4 External USB 3.0 ports 2 front, 2 rear and 6 External USB 2.0 ports 2 front, 4 rear, VGA, DP, 2 L/I, 2 L/O 1
8 USB 2.0 4 front, 4 rear, HDMI, VGA, Audio I/O front/rear 1
Front: 2 USB 3.0, 2 USB 2.0, Audio I/O, Rear: 2 USB 3.0, 4 USB 2.0, VGA, DP, RJ-45, Audio I/O,PS/2 1
Front: Four 4 USB 2.0, Audio I/O, Rear: Four 4 USB 3.0, Two 2 USB 2.0,Serial, VGA, DP, RJ-45, Audio I/O, Two 2 PS/2 3
Front: Four 4 USB 2.0, Headphone/Mic, Rear: Six 6 USB 2.0, Line In/Out, VGA, DP 1
Front: Two 2 USB 3.0,Two 2 USB 2.0, Audio I/O, Rear: Four 4 USB 2.0, Two 2 USB 2.0, Two 2 DP, VGA, Serial, RJ-45, Audio I/O, Two 2 PS/2 2
Front: Two 2 USB 3.0, Two 2 USB 2.0, Audio I/O, Rear: Two 2 USB 3.0, Four 4 USB 2.0, VGA, Two 2 DP, RJ-45, Serial, PS/2, Audio I/O 1
Front: Four 4 USB, microphone, headphone, Rear: Six 6 USB, Stereo L/I, Speakers L/O 1
Front: Four 4 USB, microphone, headphone, Rear: Six 6 USB, VGA, Serial, DP, RJ-45, PS/2 Stereo L/I, Speakers L/O 1
Front: Four 4 USB, microphone, headphone, Rear: Six 6 USB,VGA,Serial, DP, Stereo line in, Speakers line out, PS/2 4
Front: Four 4 USB 2.0 , Audio I/O Rear: Six 6 USB 2.0, VGA, DP, RJ-45, Serial, Audio I/O 3
Front: Two 2 USB, microphone, headphone, Rear: Six 6 USB, VGA, HDMI, RJ45, Stereo L/I, Speakers L/O 4
Front: Two 2 USB 2.0 one includes fast charging, Two 2 USB 3.0, Audio I/O Rear: Six 6 USB 3.0, VGA, Two 2 DP, RJ-45, PS/2, Serial, Audio I/O 1
Front: Two 2 USB 2.0, Audio I/O, Rear: Six 6 USB 2.0, RJ-45, VGA, HDMI, Audio I/O 1
Front: Two 2 USB 2.0, Audio I/O Rear: Four 4 USB 3.0, Two 2 USB 2.0, Audio I/O VGA, DP 1
Front: Two 2 USB 2.0, microphone, Audio I/O Rear: Six 6 USB 2.0, VGA, DP, RJ-45, Audio I/O, Two 2 PS/2 1
Rear: 6 USB, 1 serial port, 2 PS/2, audio in/out, Front: 4 USB, audio ports 3
