How badly would it affect the performance if I painted my heatsink with "anodizing" spray paint or black "chrome" spray paint? Just the fins btw. I know it'll probably impede the heat transfer somewhat.
as long as it doesn't prevent your heatsink from dissipating heat it should be fine
I've seen a whole bunch of other threads and replies from people way smarter than me when it comes to modding, and the majority of them seem to suggest against it : /
Everyone seems to be screaming to use anodizing paint though, and that too really thin amounts.
Since it's just the fins of a heatsink I can guarantee it won't cause any conducting issues (just stay awaaay from the part that touches the CPU), but I really wouldn't have a clue as to how it would affect cooling performance, I also wouldn't know how your paint would react to getting heated to 60c+.
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