1. What is a Bus?
A Bus is a communication system that transfers data between components inside a computer or between computers.
Collection of wires
Data Highway
Bus Technique – Reducing Costs, Improve Modularity

3. System Bus
Single Computer Bus

4. PCI Bus Peripheral Component Interconnect >32 bit (133 MBps)
Introduced by Intel, 1992
>32 bit (133 MBps)
>64 bit (max 1GBps depending on Bus Speed)
Best Slot used for Video cards

5. PCI Bus Plug and Play (automatic configuration) – no jumpers required
Also used for Network & Sound cards
PCI uses Shared Bus Topology (multiple devices can share the bus)
PCI Bus

6. PCI & PCIe are mini versions for laptop use
PCI Express
Double data transfer rate
Two way Serial Connection – Avoids problem of bandwidth sharing
Used for SSD, Network cards, Sound cards and modems
Compatible with standard PCI
PCI & PCIe are mini versions for laptop use

7. AGP Bus Accelerated Graphics Port
Advanced port designed for Video cards and 3D accelerators
Designed by Intel and introduced in August 1997
Dedicated point-to-point channel
AGP channel is 32-bits wide and runs at 66 MHz
Total bandwidth of 266 MBps

8. AGP versions Original AGP version AGP 2.0 – May 1998
1. Added 4x signaling
2. Capable of operating at 1.5V
AGP November 2000
1. Added 8x signaling
2.Capable of double the transfer speeds

9. PCI Bus Peripheral Component Interconnect Introduced by Intel, 1992
>32 bit (133 Mbps)
>64 bit (max 1GBps depending on Bus Speed)
Best Slot used for Video cards
Plug and Play (automatic configuration) – no jumpers required

10. AGP versions Original AGP version AGP 2.0 – May 1998
1. Added 4x signaling
2. Capable of operating at 1.5V
AGP November 2000
1. Added 8x signaling
2.Capable of double the transfer speeds

11. IDE Bus Integrated Drive Electronics / IBM Disc Electronics
Also known as Parallel ATA
Data Transfer Rate – 133MBps
Master Slave Configuration (BLACK - master, GRAY - slave)

12. IDE Bus

13. SATA vs PATA

14. SATA vs PATA Point of Comparison SATA PATA 1. Use Current standard
Obsolete
2.Speed
Faster
(3Gbps)
Slow
(133MBps)
3.Connection
Hot pluggable
Not hot pluggable
4.Interface
Provides External Interface
Only Internal Interface
5. Cable Size
Small cable size
Larger cables compared to SATA
6. Arrangement
Master Slave arrangement
Not supported