Black Heatsinks

[BrianG]

IIRC, anodizing is a molecular plating of sorts, so it should provide little to no barrier to heat transfer. It's not like it was powder coated or painted. As to the rough surfaces, I suppose you could wet sand the inside of the sink to remove the anodizing there, but I personally wouldn't. I think a little heatsink compound when installing it will help greatly in heat transfter - just don't get the cheap stuff as it's kinda oily because it'll ooze. I'd use something like Ceramique, which is a thicker paste.