CasEdge incorporates advance features and top quality materials into its products to benefit its customers in shortened assembly time, easy to service and extend product lifetime. PRODUCT FEATURES: Supports Intel 3G CPU (Intel Approved) Pentium P4 ready chassis; Supports up to three 5.25" devices secured with screws, which slide in/out from the front; Supports up to two 3.5" devices secured with screws, which slide in/out from the front; Support up to two 3.5" HDD secured with screws, which slide in/out from the internal HDD cage; Offers both ATX and Middle ATX motherboard compatibility; Includes seven I/O slots on rear panel, all ATX/BAT interchangeable; Features three piece cover design (door, replaceable top cover, and replaceable side panel); Features special vent holes on door and side panel for better thermal performance; Support 2.0 Version front USB, audio, and phone jack connector; Tool-less design.