Add four external PCI expansion card slots to a desktop computer. Star Tech.com's innovative PCI Express to PCI Expansion Chassis provides a quick & simple solution to I/O expandability on almost any PCI Express (PCIe) enabled system. Adding external PCI slots to a server/workstation or laptop, this cost-effective & time-saving method of simply adding additional PCI cards to a server/workstation or providing a platform to be able to swap PCI add-in cards between a mobile & desktop setup is the optimal method of maximizing the I/O capabilities of new or existing systems. The external expansion chassis adds four PCI slots (32-bit/33 M Hz) to the host computer system, through a single PCI Express connection. Providing total bandwidth of up to 250 M Bps from the x 1 PCIe host controller card, which allows the host computer to function as though the cards in the expansion chassis were connected directly to the motherboard.