3 pcie x1 expansion, 4 intel® 82573l pcie gbe controller, Figure 2-13: pcie x16 edge connector – IEI Integration PCIE-Q350 v1.30 User Manual
Page 47: Figure 2-14: pcie x1 edge connector (four lanes), N 2.6.3

PCIE-Q350 PICMG 1.3 CPU Card
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Figure 2-13: PCIe x16 Edge Connector
2.6.3 PCIe x1 Expansion
Four of the six PCIe x1 expansion channels on the PCIE-Q350 are interfaced to four PCIe
x1 connectors on a backplane through an edge connector on the bottom of the CPU card.
The PCIe x1 edge connector is shown in Figure 2-14.
Figure 2-14: PCIe x1 Edge Connector (Four Lanes)
2.6.4 Intel® 82573L PCIe GbE Controller
An RJ-45 Ethernet LAN connector is interfaced directly to an Intel® 82573L PCIe GbE
controller. The Intel® 82573L PCIe GbE controller is a compact, single-port integrated
physical layer (PHY) device with its own Memory Access Controller (MAC) and interfaced
to the Intel® ICH9DO Southbridge through a PCIe x1 lane. The Intel® 82573L GbE
controllers is shown in Figure 2-15 below.