ExpressBox 7 is an expansion solution that provides 7 full-length PCI Express slots. This is a standalone chassis in an industry standard enclosure with its own power supply. The PCI Express slots are hot-swappable. The chassis allows the flexibility to expand the I/O capabilities of a server or workstation seamlessly capitalizing on the transparency of PCI Express architecture. Add seven hot-pluggable PCIe slots in a 4U rackmount chassis with a 550W power supply and quiet cooling.