Definitions for "System Bus"
Keywords:  fsb, frontside, bus, megahertz, cpu
in digital systems, the main bus over which information flows. [SILC99][TOP OF THE PAGE
The primary pathway between the CPU, memory and high-speed peripherals to which expansion buses, such as ISA, EISA, PCI and VL-Bus, can connect. Also referred to as the external bus or host bus, and came to be used interchangeably with frontside bus (FSB) following the introduction of Intel's Dual Independent Bus (DIB) architecture in 1997.
consists of electrical pathways, which move information between basic components of the motherboard, including between RAM and the CPU
Keywords:  exclusive, message, common
System Common Message System Exclusive
This is just a collection of wires that transmit data from one component to another.