Ferrite chokes are just magnets... they filter out fluctuations in power..
ie- without them-> input voltage to GPU bounces from 11.9-12.23v
with them-> input voltage to GPU bounces from 12.29-12.23v
..their job is to "resist" change in the current..so they smooth the supply ripples. They dont filter out noise or do any of the other mythical things people think.
Or leave them on