HP ProLiant G7 c-Class server blades with Intel® Xeon® processors

Figure 5. PCIe bandwidth
PCIe 2.0 is backward compatible with PCIe 1.0: A P
CIe 2.0 device can be used in a PCIe 1.0 slot
and a PCIe 1.0 device can be used in a PCIe 2.0 slot. For best performance, however, each card
should be used in a slot that supports its logical link size.
A ProLiant G7 option allows all expansion slots to run at PCIe 1.0 rather than PCIe 2.0 speed.
Enabling this option saves power and provides backward compatibility with cards that may not
correctly operate in PCIe 2.0 slots. Administrators can control expansion slot speed through the RBSU
under Advanced Power Management Options (Figure 6).
Figure 6. Example of RBSU PCI Express Generation 2.0 support menu
The options available from the PCI Express G
eneration 2.0 Support menu include:
 Auto – Configures card to PCI-E Generation 1.0 or 2.0 based on the card’s capability. This mode
has a unique capability to work-around an issue with certain PCI-e Generation 1.0 cards that did
not work properly in PCI-e Gen 2 slots.
 Force PCI-E Generation 2 – Similar to Auto mode, this option configures the card to PCI-E
Generation 1.0 or 2.0 based on the card’s capability. However, this mode will work-around an
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