Dell PowerEdge R905 - Manual (Page 79)

Installing System Components
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5 Lower the PEM into the system and rotate the PEM handle until the PEM
is fully seated in the chassis.
Expansion Cards
Expansion Card Installation Guidelines
Your system supports up to eight PCI-Express (PCIe) expansion cards
installed in connectors on the system board (see Figure 3-10).
• All slots support full-height, half-length cards.
• Up to two 25-W cards are supported; the remaining cards must be 15-W
cards.
• Slots 1, 2, 5, 6, and 7 are x4 lane-width PCIe expansion slots.
• Slots 3 and 4 are x8 lane-width PCIe expansion slots.
• One expansion slot, labeled INT_STORAGE, is reserved for the system’s
SAS controller card.
• If you are installing a Remote Access Control (RAC) card, it must be
installed in the special card slot marked RAC_CONN. See "RAC Card" on
page 86