P400 Pci

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The full form of PCI is Peripheral Component Interconnect. It is basically a computer expansion card standard which describes the the computer bus architectures to connect components on the computer motherboard and also to provide an expansion interface to plug in add on cards. The team which standardized the PCI bus architecture is known as PCI Special Interest Group or PCISIG in short form. PCISIG is a group of more than 900 companies, which has been designing and developing enhanced versions of PCI standards to meet the growing requirements of high performance computer bus system. The PCI standards define a full plug and play capability which enables the computer Basic Input and Output System(BIOS) and the operating system to determine the resource requirements, such as interrupts,I/Os and memory and assign resources in such a way so that the conflict with other devices could be avoided.

Brief History

PCI Express standards represent the third generation of IO technology. Industry Standard Architecture or ISA was the first generation of IO technology, designed and developed by IBM in 1981. Then came PCI, the second generation  IO technology which was created by Intel in 1993. Finally, to meet the growing need of bandwidth, Intel invented PCI Express in 2004. Though initially, it was designed to facilitate high speed audio and video streaming, but in the later stages, PCI Express  became an important tool to improve the data communication between the  measurement instruments and computer by a margin of 30 times, compared to conventional PCI bus.

PCI Express Architecture

PCI Express was developed to enhance the performance of old PCI standards, which  used a clock of 33 MHz and transmitted 32 bits with the maximum bandwidth of 132 Mbits/second.

The earlier version of PCI bus employed shared bus topology, in which bus bandwidth was divided by multiple devices to enable communication among them. Later on, new devices emerged which required more bandwidth resulting in bandwidth reduction. To overcome this limitation, PCI Express standard was created, which uses point to point bus topology. The shared bus used for PCI is substituted with a shared switch, which provides bus access to each device. Instead of dividing the bandwidth among devices connected to the bus as the older PCI versions did, the PCI Express provides dedicated data pipeline to each device. Data is transmitted and received serially in packets through pairs of transmit and receive wires,known as lanes. Thus the PCI Express architecture supports full duplex communication between two devices with no restriction on concurrent access across multiple devices. The transaction layer of the PCIe port handles the message traffic.The maximum communication speed is 250 Mbits/second.

The PCIe connection between two devices could comprise maximum of 32 lanes. The number of lanes is automatically determined during the initialization of devices and could be restricted by either of the devices. The PCIe standard specifies  slots and connectors for multiple link widths. This enables the PCIe bus to cater to both performance critical applications as well as cost sensitive applications.

Compatibility Of PCIe With Older Versions Of PCI

Though PCIe maintains backward compatibility with older versions of PCI at the software level, but substitutes the physical layer with a high speed serial bus of 2.5Gigabites/second. That is why PCIe and PCI slots are not compatible. Devices with smaller connectors could be plugged into bigger host connectors on the motherboard but devices with larger connectors cannot be plugged into devices with smaller connectors.

PC Support For PCI Express

PCIe bus is widely used in numerous industrial,server and consumer applications. Its is mainly used as an expansion card interface for add-on boards as well as motherboard interface. In almost all types of computers, PCIs bus operates as the basic motherboard interface, connecting the host system processor to the on-board and add-on peripherals. So if PCIe bus goes bad, then the entire computer system might start malfunctioning. Since the PCIe bus technology is a complex one,
network support
for it should be availed of. Nowadays many Computer support providers  are rendering tech support for PCIe bus technology.

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HP Smart Array P400 512 MB SAS PCI E RAID Controller 504022 001 low profile
HP Smart Array P400 512 MB SAS PCI E RAID Controller 504022 001 low profile
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412206 001 P400 SAS CTRLR 8PORT 3GB PCI E DL36XG5
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HP Smart Array PCI e P400 512MB SAS 411064 B21 BBWC Controller
HP Smart Array PCI e P400 512MB SAS 411064 B21 BBWC Controller
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Lot of 9 HP 447029 001 Smart Array P400 Controller 8CH SAS PCI E zy
Lot of 9 HP 447029 001 Smart Array P400 Controller 8CH SAS PCI E zy
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HP Smart Array P400 512MB PCI e SAS RAID Controller 447029 001 405835 001 +Cable
HP Smart Array P400 512MB PCI e SAS RAID Controller 447029 001 405835 001 +Cable
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HP Smart Array P400 512MB PCI Ex8 SAS Raid Controller 405832 001 405835 001
HP Smart Array P400 512MB PCI Ex8 SAS Raid Controller 405832 001 405835 001
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Hp Smart Array P400 Raid Controller 256 MB SAS Pci E 405831 001 Low Profile
Hp Smart Array P400 Raid Controller 256 MB SAS Pci E 405831 001 Low Profile
$4.85
HP Smart Array P400 RAID Controller 256 MB SAS PCI E 447029 001
HP Smart Array P400 RAID Controller 256 MB SAS PCI E 447029 001
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Hp Smart Array P400 Raid Controller 256 MB SAS Pci E 447029 001 Low Profile
Hp Smart Array P400 Raid Controller 256 MB SAS Pci E 447029 001 Low Profile
$3.90
HP SMART ARRAY P400 PCI E SAS RAID CONTROLLER 256MB Cache 447029 001 405836 001
HP SMART ARRAY P400 PCI E SAS RAID CONTROLLER 256MB Cache 447029 001 405836 001
$8.37
405832 001 HP Smart Array P400 PCI Ex8 Dual Int SASx4 Raid Controller Board
405832 001 HP Smart Array P400 PCI Ex8 Dual Int SASx4 Raid Controller Board
$37.88
HP SMART ARRAY P400 256MB PCI E SAS RAID CONTROLLER 447029 001 405836 001
HP SMART ARRAY P400 256MB PCI E SAS RAID CONTROLLER 447029 001 405836 001
$12.99
HP 504023 001 Smart Array P400 SAS Raid Controller 8 Channel 3GB PCI E
HP 504023 001 Smart Array P400 SAS Raid Controller 8 Channel 3GB PCI E
$7.95
447029 001 HP Smart Array P400 SAS RAID 256MB Cache PCI E Controller Card
447029 001 HP Smart Array P400 SAS RAID 256MB Cache PCI E Controller Card
$14.99
HP P400 PCI E SAS Raid 256MB 405831 001 w Cables NO BATT DL380 G5 DL385 G2
HP P400 PCI E SAS Raid 256MB 405831 001 w Cables NO BATT DL380 G5 DL385 G2
$6.49
HP 405835 001 Smart Array P400 512MB BBWC PCI E SAS RAID Controller  Free Ship
HP 405835 001 Smart Array P400 512MB BBWC PCI E SAS RAID Controller Free Ship
$18.00
HP Smart Array P400 SAS RAID Controller PCI E Low Profile 512MB 504022 001
HP Smart Array P400 SAS RAID Controller PCI E Low Profile 512MB 504022 001
$13.15
HP Smart Array P400 512MB PCI Ex8 SAS Raid Controller 405832 001 405835 001
HP Smart Array P400 512MB PCI Ex8 SAS Raid Controller 405832 001 405835 001
$19.00
HP 013159 003 SMART ARRAY P400 8CHANNEL LOW PROFILE PCI E RAID CONTROLLER
HP 013159 003 SMART ARRAY P400 8CHANNEL LOW PROFILE PCI E RAID CONTROLLER
$12.99
HP Smart Array P400 RAID Controller 512MB PCI Express x8 405832 001 405835 001
HP Smart Array P400 RAID Controller 512MB PCI Express x8 405832 001 405835 001
$14.50
HP 405832 001 Smart Array P400 PCI E SAS RAID Controller Card
HP 405832 001 Smart Array P400 PCI E SAS RAID Controller Card
$20.00
HP 447029 001 Smart Array P400 SAS Raid Controller ProLiant DL585 405835 001 PCI
HP 447029 001 Smart Array P400 SAS Raid Controller ProLiant DL585 405835 001 PCI
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HP Smart Array P400 256MB PCI Ex8 Dual Port SAS Raid Controller 504023 001
HP Smart Array P400 256MB PCI Ex8 Dual Port SAS Raid Controller 504023 001
$6.99
HP 441823 001 Smart Array P400 512MB SAS PCI e RAID Controller Fully Tested
HP 441823 001 Smart Array P400 512MB SAS PCI e RAID Controller Fully Tested
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HP Smart Array SAS SATA PCI e x8 P400 256MB 012760 002 RAID Controller
HP Smart Array SAS SATA PCI e x8 P400 256MB 012760 002 RAID Controller
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HP 447029 001 Smart Array P400 SAS Raid Controller ProLiant DL585 405835 001 PCI
HP 447029 001 Smart Array P400 SAS Raid Controller ProLiant DL585 405835 001 PCI
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HP Smart Array LSI P400 SAS RAID PCI e Controller 512MB w Cables and Battery
HP Smart Array LSI P400 SAS RAID PCI e Controller 512MB w Cables and Battery
$12.96
HP 504022 001 P400 8 CH PCI e SAS Raid Controller 512MB with BBWC
HP 504022 001 P400 8 CH PCI e SAS Raid Controller 512MB with BBWC
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HP Smart Array P400 PCI E SAS Raid Controller w 256MB Cache NC7771 LOT OF 2
HP Smart Array P400 PCI E SAS Raid Controller w 256MB Cache NC7771 LOT OF 2
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used HP 441823 001 Smart Array P400 512MB SAS PCI e RAID Controller
used HP 441823 001 Smart Array P400 512MB SAS PCI e RAID Controller
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HP Smart Array P400 PCI E SAS 512MB Controller 447029 001 405835 001 013160 000
HP Smart Array P400 PCI E SAS 512MB Controller 447029 001 405835 001 013160 000
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HP 504022 001 447029 001 Smart Array P400 SAS RAID Controller PCI E Low Profile
HP 504022 001 447029 001 Smart Array P400 SAS RAID Controller PCI E Low Profile
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