User manual

33 Chapter 2
2.23 PCI Slots (PCI 1 ~ PCI 2)
The AIMB-554 provides 2 32-bit / 33 MHz PCI slots.
Note: 64-bit PCI or PCI-X expansion cards installed in
the PCI 1 slots will not fit because of the south
bridge heat sink. If you want to use 64-bit PCI or
PCI-X expansion cards, please install them in the
PCI2.