Don't expect to use a Steam Link with a steering wheel & pedals setup, although Steam sells 3rd party software that Claims it can be used in this manner, it simply does not have the processing power to enable this useage.
(I was trying to use it with a Thrustmaster T500 RS)
It needs 75% of it's CPU to process image data, and it needs significantly more than 25% for such an input device, and it gets that (has to as Windows does not play nice with incomplete USB data - BSOD etc) buy dropping Lots of frames.
- expect 5 - 15 fps issues.
Glad I did not pay much for my one...