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I/O technologies
The DL580 G7 supports up to eleven I/O full length, full height expansion slots with the available option cards
installed. The standard configuration includes five slots, 2 PCIe x8 2.0 and 3 PCIe x4 2.0. Two optional cards are
available:
Option No. 1, Standard PCIe
1 PCIe 2.0 x4, 1 PCIe 1.0 x4 and 4PCIe 2.0 x8
Option No. 2, Combination PCI—X, PCIe and 300W GPU
2 PCI-X 64 bit, 1PCIe 2.0 X4, 2PCIe 2.0 X16
PCIe 2.0 (Gen 2) is an expansion bus technology that arises from earlier PCI and PCIe technologies. The server uses
a serial interface running at 5 Gb/s. A PCIe interface supports one or more lanes, as determined by the PCIe slot.
Multiple-lane connections are x4 for a 4-lane link, x8 for an 8-lane link, and x16 for a 16-lane link.
Each PCIe 2.0 lane consists of four wires for a differential pair of transmit-and-receive signals. Each runs serially at
5 Gb/s with an 8b10b encoding (10-bit symbols to represent 8 data bits). Each PCIe 2.0 lane has a bandwidth of
512 MB/s in each direction (for a total bandwidth of 1 GB/s per lane).
The end ports of PCIe links automatically negotiate the highest bit rate and the highest number of lanes that the slot
and the add-in card support. A PCIe expansion card can run correctly in any slot it will fit.
With enormous aggregate IO bandwidth, the DL580 G7 supports concurrent operation of all 11 slots. The server
offers the support for dual- and triple-slot, high-powered PCIe add-in cards. With unencumbered bandwidth to the
host memory, such 200W and 300W add-in boards may perform high-performance computations demanded by
vector processors and IO accelerators.