Speed testing -x16 vs. -x1 with PCI Express video cards
pcie x1 video card - Newegg.com
New GT210 PCIE X1 1GB Support PCIE X4 / X8 / X16 Graphics Slot Video Card GPU | eBay
x16 GPU in PCIe x1 slot: The caveats - The Silicon Underground
PCIe x1 to 3 x1 Slot PCI-e Express Switch Multiplier Hub GPU Riser Card Adapter w/USB 3.0 Cable,PCIe 1x to 3 Ports Splitter Power by SATA & Molex for Video Card Mining
AMD Radeon HD 8490 1GB PCI-Express X1 Modified Video Card GPU | eBay
The Convenience of PCI Express x1 Graphics Cards - YouTube
Amazon.com: BTBcoin PCI-E Riser 009S GPU Riser Adapter Card PCIE X1 to X16 Extender PCI-Express Riser Cable for Bitcoin Litecoin ETH Coin Mining - 6 Pack : Electronics