HP BL680c HP local I/O technology for ProLiant and BladeSystem servers - Page 6

Backward compatibility, Form factors, Aggregate Bandwidth MB/s

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Figure 5 illustrates the bandwidths of PCI, PCI-X, and PCI Express, which will provide sufficient I/O bandwidth migration for server I/O growth requirements. PCI Express bandwidth is shown using the sum of the receive and transmit bandwidths. Figure 5. I/O bandwidth of PCI, PCI-X, and PCI Express (PCIe) Aggregate B andwidth (MB /s ) 9000 8000 7000 6000 5000 4000 3000 2000 1000 0 10GbE 10GbF C 1GbE 1GbF C 1x IB 1394b Dual U320 Quad U320 P CI x1 P CI- X P CI- X x2 P CI- X x4 X8 x4 x16 x8 64/66 P CIe 100 133 P CIe 266 P CIe P CIe P CIe 2.0 P CIe P CIe 2.0 Backward compatibility PCI Express is compatible with PCI at the software layers (operating system, applications, and drivers). New software is required to take advantage of new and extended PCI Express architecture features. The PCI Express configuration uses standard PCI plug and play and PCI Hot Plug mechanisms. PCI Express is not compatible with PCI at the board or connector level. Form factors The PCI Express specification includes a range of form factors and connector sizes. Connector sizes include the following: • x1 connector for desktop I/O • x4 and x8 connectors for server I/O • x16 connector for desktop graphics and server I/O 6

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Figure 5 illustrates the bandwidths of PCI, PCI-X, and PCI Express, which will provide sufficient I/O
bandwidth migration for server I/O growth requirements. PCI Express bandwidth is shown using the
sum of the receive and transmit bandwidths.
Figure 5.
I/O bandwidth of PCI, PCI-X, and PCI Express (PCIe)
0
1000
2000
3000
4000
5000
6000
7000
8000
9000
Aggregate Bandwidth (MB/s)
P CI
64/66
x1
PCIe
PCI-X
100
PCI-X
133
x2
PCIe
PCI-X
266
x4
PCIe
X8
PCIe
x4
P CIe 2.0
x16
PCIe
x8
P CIe 2.0
1x IB
Dual U320
Quad U320
10GbE
10GbF C
1394b
1GbE
1GbF C
Backward compatibility
PCI Express is compatible with PCI at the software layers (operating system, applications, and
drivers). New software is required to take advantage of new and extended PCI Express architecture
features. The PCI Express configuration uses standard PCI plug and play and PCI Hot Plug
mechanisms. PCI Express is not compatible with PCI at the board or connector level.
Form factors
The PCI Express specification includes a range of form factors and connector sizes. Connector sizes
include the following:
•
x1 connector for desktop I/O
•
x4 and x8 connectors for server I/O
•
x16 connector for desktop graphics and server I/O
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