It controls the part of the external data bus connected to the expansion slots.
expansion bus
PCI Bus
normally the PCIE slot
PCIe
We have on a motherboard called a input/output device. There are multiple of types, but the most common are PS/2, DVI, and USB. There are wires connected to the device called a Bus. The bus sends data to the processor where it is interpreted as data.
An expansion bus will not work in sync with the CPU. In addition, it will not work with the system clock.
expansion bus
You get the 450 bus
A bus that works asynchronously with the CPU is -the expansion bus
No. An expansion bus always connects to South Bridge. http://www.wisegeek.com/what-is-southbridge.htm
bus
display
A local bus is one which is integrated into the computer. Typically, this includes the Frontside Bus (or Hypertransport in AMD), the Memory Bus, the PCI bus, the PCI Express Bus (if present), the AGP Bus (if present), and onboard peripheral busses such as IDE, SATA, USB, IR, Firewire, and many others. Expansion buses are those which are not built in. For example, if you do not utilize onboard video, you would use a PCI, AGP, or PCI-E expansion bus to add video capabilities.
Liquid Crystal Display Least Common Denominator
MCA is a 32 bit expansion bus
USB
AGP