Enterprise Computing Systems
PCI Express is expected to be deployed initially in desktop and server systems. These computers typically utilize a chipset solution that includes one or more microprocessors and two types of special interconnect devices, called northbridges and southbridges. Northbridges connect the CPU with memory, graphics and I/O. Southbridges connect to standardized I/O devices such as hard disk drives, networking modules or devices, and often PCI expansion slots.
Desktop Systems
Typical use of PCI Express in a desktop application is shown in Figure B-2 on page 992. The PCI Express ports come directly out of the northbridge, and are bridged to PCI slots that are used for legacy plug-in cards. In some implementations the PCI Express ...
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