IEI Technology IMBA-9654, User Manual, Page: 47 / 260

IMBA-9654 ATX Motherboard
Page 27
Figure 2-11: USB Connector
2.6 Intel® ICH8DO PCIe Bus Components
2.6.1 PCIe Bus Overview
The IMBA-9654 Intel® ICH8DO southbridge PCIe bus is split into two PCIe x1 channels
and one PCIe x4 channel. The two PCIe x1 channels are each connected to a Broadcom
PCIe GbE controller. The PCIe x4 channel is connected to a PCIe x4 slot.
2.6.2 PCIe x4 Expansion
Four of the PCI express root ports are connected to a single PCIe x4 expansion slot
enabling PCIe x4 cards to be installed on the system.