Amazon.com: Mini PCIe 1x to PCI Express x16 Riser Card for Laptop External Graphics Card GDC Miner Mini PCIe to PCI-e Slot for BTC Mining : Electronics
x16 GPU in PCIe x1 slot: The caveats - The Silicon Underground
2U Riser Card w/1 x PCI-E x16 on slot-7 + 2 x PCI-64 on slot-6 and slot-5, Model # EJ-RC2UE164