Dell PowerEdge R815 - 10 O Slots; Overview; PCI Risers

Dell
PowerEdge R815 Technical Guide 37
10 I/O Slots
10.1 Overview
See Expansion Cards and Expansion-Card Risers section in the Installing System Components chapter
of the PowerEdge R815 Hardware Owner’s Manual on Support.Dell.com/Manuals
.
The Dell™ PowerEdge™ R815 includes a total of 6 PCI slots that reside on the IO planar and two riser
cards.
Two low-profile PCI Express slots are provided on the IO planar.
• Slot3:
o Physical x8 (x8 electrical) PCI Express Gen2 slot
• Slot4:
o Physical x8 (x8 electrical) PCI Express Gen2 slot
o NC-SI cable header for NC-SI supported NICs
The two PowerEdge R815 PCI Express risers provide up to four expansion slots and one internal slot as
follows:
• Riser1 (Center; all slots are controlled from the PEX8642 PCIe Gen2 arbiter):
o Slot1 (top)
 Physical x16 (x8 electrical) PCI Express Gen2 slot
o Slot2 (bottom)
 Physical x8 (x4 electrical) PCI Express Gen2 slot
 Storage Slot (internal, accommodates internal RAID controllers with no sled)
 Physical x8 Storage adapter (x4 electrical) PCI Express Gen2 slot
• Riser2 (Left):
o Slot5 (top)
 Physical x16 (x8 electrical) PCI Express Gen2 slot
o Slot6 (bottom)
 Physical x16 (x8 electrical) PCI Express Gen2 slot
 Both slots are controlled from the IOB PCIE Gen2 arbiter (port GPP)
The PowerEdge R815 supports 25W maximum power for the 1
st
and 2
nd
cards and 15W for the 3
rd
through 6
th
cards. The lower power support on the 3
rd
through 6
th
cards is due to system thermal
limitations.
10.2 PCI Risers
The PowerEdge R815 requires two PCI Express risers: Riser1 and Riser2. Both risers must be
connected for the system to power up. Each riser connects to the planar through a physical x16 PCI
Express connector with Dell custom pin-out. See Table 10.