Asus Z8PH-D12/IFB - Manual (Page 38)

2-20 Chapter 2: Hardware information
2.5.4 PCI Express x16 slot (x16 link)
The onboard PCI Express x16 slot provides x16 link to Intel 5500 I/O Hubchipset.
This slot supports VGA cards and various server class high performance add-on
cards. It also supports a special riser card with two PCI Express x16 (x8 link) slots
for 1U server system.
PCIEx16 slot (x16 link)
2.5.5 Installing ASMB4 management board
Follow the steps below to install an optional ASMB4 management board on your
motherboard.
1. Locate the BMC_FW1 header on
the motherboard.
2. Orient and press the ASMB4
management card in place.