Asus P7F-M WS - Manual (Page 35)

ASUS P7F-M WS 2-17
2.5.4 PCI Express x16 slot (x16 link)
The onboard PCI Express x16 slot provides one x16 link to CPU. This slot supports
VGA cards and various server class high performance add-on cards.
2.5.5 PCI Express x8 slot (x4 link) or MIO support
This slot supports PCI Express cards that comply with the PCI Express
specifications. This slot also supports a MIO (Media Input Output) audio card,
which offers great sound quality to complement the robust video power. Install
the bundled audio card on this slot only, otherwise the audio card may not work
properly. Refer to the figure below for the location of the slot.
2.5.6 PCI slots
The PCI slot supports cards such as a LAN card, USB card, and other cards that
comply with PCI 2.3 specifications.
PCI Express x8 slot with MIO support (x4 link)
PCI Express x16 slot (x16 link)
PCI_2 slot
PCI_1 slot