Thermally Advantaged Chassis
ATX V2.1 compliant
Screw-less CDROM ,HDD & Add-on cards assembly
Screw-less lockable side panel
U-seam designed for EMI solution
High performance AGP card holder
Front access USB2.0 & Audio ( 1394 optional)
Low acoustic level

自問自答∼果然是2.0 USB