The requirement is a HDMI to USB frame grabber internal card or a DisplayPort to USB frame grabber internal.
So far I have found DP/HDMI to PCIe frame grabber internal cards. http://www.unigraf-china.cn/en/products/dp-compliance-test-hardware/ufg-04-dp/ https://www.unigraf.fi/products/frame-grabbers/ufg-07-hsdp https://www.epiphan.com/products/dvi2pcie-duo/
Or is there a converter for sending the PCIe data from these cards across a USB port. In other words,is there a PCIe to USB converter ?