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Different Types of Buses

Front Side bus

Bus on the motherboard that transfers data between the CPU and the chipset

Memory Buses:  RAM bus and DRAM bus

Usually transfers data multiple times during a clock cycle or uses multiple channels to transmit data to increase data transfer rate to match that of the CPU.

ISA (Industry Standard Architecture)

Becoming obsolete

Word size or width of the data path is 16 bits, running at a mere 8 MHz

PCI (Peripheral Component Interconnect)

Predominant bus for newer systems

32 bits (standard), running at 33 MHz—giving PCI up to 133MBps of bandwidth

AGP (Accelerated Graphics Port)

Bus architecture similar to that of PCI

Provides video cards with rapid access to the system memory

To date, only used for graphics cards, especially those that perform texture-mapping onto three-dimensional renderings

Very fast, running at 66 MHz with a 32-bit word size, and transferring 266 MBps

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