In the computer case Chieftec HT-01B-OP up to two 5.25 ", an external 3.5-drive and two 3.5" can - and a 2.5 "hard disk are installed ergonomically positioned, the front ports. . USB and Audio the cooling is not neglected: a fan with 120, 90 or 80 mm, the "cool down" the installed components take over.