Which Pcie slot for gpu : rbuildapc

The SATA3 4, 5 connectors will become unavailable when a device is installed in the PCIEX2 slot 2 x PCI Express x1 slots

slot; but, there is a note in the manual stating: Due to a hardware limitation, the PCIEX1_1 slot can only accommodate a shorter PCI Express x1

slot machine lock Not sure why they didn't just link PCIEX1_1 to PCIEX4 as that slot usually becomes unusable due to the GPU also, i can't seem to find any

slot games promotions Not sure why they didn't just link PCIEX1_1 to PCIEX4 as that slot usually becomes unusable due to the GPU also, i can't seem to find any