Antec 1200 has plenty of room for air circulation, thanks to the seven fans installed in the cabinet. Along with a big 200 mm fan on top, two 120 mm fans in the back blow hot air out of the case. Knobs at the rear of the machine control their speeds. For fresh-air intake, the front panel houses three 120 mm fans which are equipped with air filters.

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These fans too have controllers that are placed on the front panel of the case. There is also a provision to install an inlet fan as well at the transparent sides cover. There are three 5.25-inch external bays, nine 3.5-inch internal bays, and one 3.5-inch external bay. The vacant 5.25-inch bays at the top are used for installing optical drives. However if you decide to install more optical drives, at least one of the fans needs to be sacrificed. There are nine expansion slots and the casing also has a provision for water cooling, if you need that in future. The front panel has an eSATA port and two USB ports, and audio jacks as well. If you have a number of hard drives and an extra graphics card as well, it's advisable to install at least an 800 or 1000 Watt Power Supply Unit. Because of its inverted design the PSU rests at the bottom of the case.