I was looking at Pro Capture HDMI 4K - Magewell
- Support for capture image resolutions up to 4096x2160 pixels
- Support for capture frame rates up to 144fps (Actual capture frame rate can be limited by PCIe bandwidth & image resolution)
EDIT: nohdcp - not an issue at least on the 1080 cards!
EDIT2: by far my fav brand absolutely rock solid on linux!