yeah those been out forever they are just a over glorified pci-e powered riser it just converts a mini-pcie to a electrically compatible pci-e x1 slot yes u can use a x16 card in a 1x and any other, card will just run only at that pci-e speed its on so really that device is a marketing scam as it would suck at gaming only real use is adding extra monitors or scientific studies that dont need high pci-e speed
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