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

*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

So I've been wondering if PCIE x1 slots can are as fast as my SSD? My SSD has around 500 mbs read and write, so I need the PCIE x1 slot to have

plug slot 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

iceland slot game logo png 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