Asus PCH DR - Motherboard - Extended ATX User Manual page 15

Gigabit LAN solution
The Intel ® 82547GI Gigabit Ethernet controller allows full-duplex Gigabit
performance on LAN on Motherboard (LOM) applications through the
Communication Streaming Architecture (CSA). Instead of connecting to
the PCI bus, the controller connects to the dedicated CSA bus on the
Memory Controller Hub (MCH) thus reducing the PCI bottlenecks by
freeing the PCI bus for other I/O operations.
The Intel ® 82541GI Gigabit Ethernet controller is also onboard to support
32-bit LAN through the PCI bus.
ASUS PCH-DR motherboard 1-3