Interesting observation.. copper is light and aluminum is heavy. Someone drop a ThermalRight cpu heatsink on his toes lol

Quote Originally Posted by G Abhinav
One more thing; to reduce cost, copper blocks are made very thin and light. So even little corrosion renders it paper thin and you're more likely to get leaks with copper blocks. But Innovatek blocks are solid aluminum blocks and are quite heavy and you can even kick it around provided you don't damage the smoothness of the base-plate.