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Definition: PCI-SIG


(PCI-SIG, Beaverton, OR, www.pci-sig.com) An industry consortium founded in 1992 that owns and maintains all PCI technologies. PCI-SIG also sponsors workshops and technical conferences. Standing for PCI Special Interest Group, more than 900 member companies are involved. Following is a comparison of PCI speeds. For PCI interconnects, see PICMG.

 PCI SPECIFICATIONS

             Bus    Clock  Date Rate
 Ver. Year  (bits)  (MHz) (GBytes/sec)
 
 PCI - Parallel Shared
 1.0  1992   32        33   .133
 2.0  1993   32/64     33   .133/.266
 2.1  1995   32/64     66   .266/.533
 2.2  1998   32/64     66   .266/.533
 2.3  2002   32/64     66   .266/.533
 See PCI.


 PCI-X
 Parallel Shared
 1.0  1999   64        66       .533
 1.0  1999   64       133      1.066
 Point-to-Point
 2.0  2002   64 DDR   133      2.132
 2.0  2002   64 QDR   133      4.264
 DDR=Double Data Rate
 QDR=Quad Data Rate
 See PCI-X.


 PCI Express 16 Lanes (PCIe x16)
 Serial Switched Point-to-Point
                         Full Duplex
 Ver. Year    Lane Speed (GBytes/sec)
 1.0  2002     250MB/sec      8.0
 2.0  2007     500MB/sec     16.0
 3.0  2010       1GB/sec     32.0
 4.0  2017       2GB/sec     64.0
 5.0  2019       4GB/sec    128.0
 6.0  2021       8GB/sec    256.0
 See PCI Express.





Types of Expansion Cards
PCI Express (PCIe) superseded PCI, PCI-X and AGP. The edge connector configuration prevents a card from being inserted into the wrong slot.