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ExpressBox 3200 | 9
Appendix B PCI Express General Information
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Appendix B PCI Express General Information
9.1
What is PCIe / PCIE
Peripheral Component Interconnect Express (PCIe or PCI-E) PCI-Express is a standard developed to allow expansion cards to be plugged into a
computer and communicates to the rest of the computer and other peripheral devices. It replaces the older PCI, PCI-X and AGP bus standards
PCI Express is a serial connection that operates more like a network than a bus. Instead of one bus that handles data from multiple sources. PCI-
Express uses a switched topology, it controls several point-to-point serial connections. in which all cards can communicate at the same time
with the host.
PCIe provides lower latency and higher data transfer rates than parallel busses such as PCI and PCI-X
PCI-Express also uses the concept of lanes, you can tell how many lanes a slot uses by its length.
http://i.imgur.com/JxN1FDm.jpg
. The more
lanes the more bandwidth it provides.
9.2
How PCI Express Works
A PCI Express* (PCIe*) ‘link’ comprises from one to 32 lanes. Links are expressed as x1, x2, x4, x8, x16, etc. The link is negotiated and configured
on power up. More lanes deliver faster transfer rates; most graphics adapters use at least 16 lanes in today’s PCs. The clock is embedded in the
data stream, allowing excellent frequency scaling for scalable performance
9.3
What is Lane
Data transfer is carried by two signal pairs, two wires for transmitting and two wires for receiving. Each set of signal is called a “lanes”, and
each lane is capable of sending and receiving 8-bit data packets simultaneously between two packets. You can have one, two, four, eight,
sixteen or 32 lanes in a single PCIe slot (x1, x2, x4, x8, x16, x32). Lane’s counts are written with an “x” prefix (for example “x8” represents an
eight-lane card or slot. The x16 is the largest size in common use. The lane count of a PCIe card or the PCIe slot is a determining factor its
performance.
Summary of Contents for EB3200
Page 1: ...ExpressBox 3200 PCIe to PCIe Expansion User Manual SKU EB3200 www onestopsystems com...
Page 13: ...One Stop Systems ExpressBox 3200 1 Introduction ExpressBox 3200 13 1 8 Parts Overview...
Page 31: ...One Stop Systems ExpressBox 3200 2 Hardware Installation 31 2 8 2 Clamp Position Orientation...
Page 85: ...Manual P N 09 09959 03 Rev A...
