crwdns2934241:0crwdne2934241:0 tbo679

crwdns2934249:0crwdne2934249:0:

I don't know the answer but you may just put the heat sink on precision scales, so you can calculate the density.

Copper is much heavier than aluminium.

http://periodictable.com/Properties/A/Density.al.html

crwdns2915684:0crwdne2915684:0:

open