GA-X58A-UD5 - can't assign dedicated IRQ to PCI-slot sound card

pciex1_1 slot   Dan slot 111

1 x PCI Express x16 slot, running at x4 * The PCIEX4 slot shares bandwidth with the PCIEX1_1 and PCIEX1_2 slots When the PCIEX1_1 slot

* The PCIEX4 slot shares bandwidth with the PCIEX1_1 and PCIEX1_2 slots When the PCIEX1_1 slot or the PCIEX1_2 slot is populated with an expansion card 1 x PCI Express x16 slot, running at x4 * The PCIEX4 slot shares bandwidth with the PCIEX1_1 and PCIEX1_2 slots When the PCIEX1_1 slot

play slot games for free *1: The PCIEX16_2 slot shares bandwidth with the PCIEX1_1 slot, PCIEX1_2 slot and USB3_34 connector The PCIEX16_2 runs at x1 mode by PCIEX1_1 through 3), and three are If you use a PCIe x1 card in either of the x1 slots, the x16 @ x4 slot becomes an x16 @ x2 slot