What CPU fan is better?

[Rand Dusing]

Is the Zalman 7000A-CU or 7000A-AlCu better? They each have different amounts of thermal something.

[Optimus Prime]

I'd go for the pure copper one.

[Rand Dusing]

Ok, the only thing I noticed between them different beside the thermal (resistance?) is its weigth.

[Gettinbye]

If weight is the ONLY difference, and all other things being equal, I'd go for the lowest weight so as to save the possibility of causing damage while moving a computer with an overweight heatsink.

[Rand Dusing]

No, the Cu has a different thermal resitance then the AlCu which would make sense, since Cu can transfer heat better than Al.