Asus P5KR - Manual (Page 45)

ASUS P5KR 2-21
2.5.4 PCI slots
The PCI slots support cards such as
a LAN card, SCSI card, USB card,
and other cards that comply with PCI
specifications. The figure shows a LAN
card installed on a PCI slot.
2.5.5 PCI Express x1 slot
This motherboard supports PCI Express
x1 network cards, SCSI cards and other
cards that comply with the PCI Express
specifications. The following figure
shows a network card installed on the
PCI Express x1 slot.
2.5.6 Two PCI Express x16 slots
This motherboard supports two ATI
CrossFire™ PCI Express x16 graphics
cards that comply with the PCI Express
specifications.
The figure shows two graphics cards
installed on the PCI Express x16 slots.