(1) The primary pathway between the CPU and memory. The speed is derived from the number of parallel channels (16 bit, 32 bit, etc.) and clock speed. Also known as a "frontside bus," it is faster than the peripheral bus (PCI, ISA, etc.), but slower than the backside bus. See peripheral bus, backside bus and Northbridge.|
(2) The primary pathway between the CPU and peripherals. See peripheral bus.