The Rosewill R519-BK is full of features that make it a cinch to build in, and make your new system look good! There's plenty of room for expansion with four external drive bays (three 5.25" and 1 3.5") and five internal 3.5" drive bays. 7 expansion slots on the back give room for add on cards, and mount your drives without pain. Rosewill includes plenty of ways to keep your system cool. Side vents by drive cage help all the hard drives run cool in the hottest situations. Advanced air guide design efficiently directs the air where it's most needed. There is a 500W power-supply delivers ample power for your needs and comes with connections for the most current applications including SATA and PCI-e. Build the system you need in the case that'll keep it happy and safe! With Power Supply: Yes Power Supply Mounted: Top With Side Panel Window: No External 5.25" Drive Bays: 3 External 3.5" Drive Bays: 1 Internal 3.5" Drive Bays: 5 Front Ports: 2 x USB 2.0 2 x Audio (AC97 & HD plugs) PSU Main Connector: 20+4Pin