"2.6 Expansion Slots (PCI and PCI Express Slots)
There are 2 PCI slots and 3 PCI Express slots on this motherboard.
PCI slots:
PCI slots are used to install expansion cards that have the 32-bit PCI
interface.
PCIE slots:
PCIE1 (PCIE 3.0 x16 slot) is used for PCI Express x16 lane width
graphics cards, or to install PCI Express graphics cards to support
CrossFireX
.
PCIE2 (PCIE 2.0 x1 slot) is used for a PCI Express x1 lane width card,
such as a Gigabit LAN card, SATA2 card or ASRock Game Blaster, etc.
PCIE3 (PCIE 2.0 x16 slot) is used for PCI Express x4 lane width graph
-
ics cards, or to install PCI Express graphics cards to support
CrossFireX
.
1. In single VGA card mode, it is recommended to install a PCI Express
x16 graphics card on PCIE1 slot.
2. In CrossFireX mode, please install the PCI Express x16 graphics
cards on PCIE1 and PCIE3 slots. Therefore, PCIE1 will work at x16
bandwidth, while PCIE3 works at x4 bandwidth.
4. Only PCIE1 slot supports Gen 3 speed. To run the PCI Express in
Gen 3 speed, please install an Ivy Bridge CPU. If you install a Sandy
Bridge CPU, the PCI Express will run only at PCI Express Gen 2 "
Quello che riporta il manuale della tua scheda madre, quindi non si fa cenno ad usare una periferica diversa dalla vga nel secondo slot pciex "lungo" che comunque eletttricamente parlando è 4x se guardi bene non ci sono i pin elettrici dentro per tutta la lunghezza.
Se non vuoi rischiare prendine una esterna o una pci usata.