Features and Benefits:Thermally Advantaged Design Fully frame of reference Intel design guide Meet Intel 3.4+GHz CPU Thermal Requirement Big round venting holes for air flowOptional side and rear cooling fansside venting air ductEasy maintenance and installationPatented screw design for 5.25”x 4and 3.5” x2devices Removable external 3.5”x 1 device Removable internal 3.5 drive (optional) Screw design for add-on cards, CD-ROM, and FDD Labor Care , Labor Friendly Non-angle, non-hurtting hand design, Deeply pressed molding techniques adopted, and all edges folded for user protection.Maximum Security Stander offering padlock loop、supports Kensington lock USB2.0 FPIO Support Optional USB2.0/AC97’Audio or USB2.0/High Definition Audio FPIO Board Excellent EMI Solution Optimized real contact points for each assembly part Optional EMI conductive spring for slot windows Support Kensington lock, key lock (option) USB2.0 FPIO Support Optional USB2.0/Audio or USB2.0/Audio FPIO board OthersProfessional anti-electromagnetic radiation design, safety and environment protectionSuperior quality anticorrosive steel