Which PCIe slot is to be used

Aurora R13, PCIe x4 slot not working? So, this is following up on the Elgato 4K60 capture card not showing up when installed on the top

My mobo manual says that the x16 slot is for a GPU, but more googling has revealed that others have plugged a x1 raid controller in the slot

slot gratis pierino In terms of storage, the NUC 14 Pro+ features one 2280 PCIe Gen4x4 NVMe SSD slot and one 2242 PCIe x4 NVMe SSD slot NUC 14 Pro+

play gems bonanza slot slot available Is it possible use this slot? Solution PCIe boards can fit into slots designed for their lane configuration or higher