Lowell: What do you like doing in your spare time? wasteful vermox canada licence helping Inside they found a tiny logic board encased in "a big hunk of aluminum heat sink." That's a relative term of course, the heat sink for this 2in unit is only "big" in terms of how much of the Chromecast's insides it occupies. Google warns that the Chromecast "may get hot to the touch; this is normal." iFixit, on the other hand, says this is "disconcerting.".