dunno la bro still waiting zhen wei ask from his supplier about cooler i think its juz same as HIS 3870 IceQ3 Turbo except 2 heatpipes. i've read from somewhere the whole metal piece on 3870 IceQ3 is made from aluminum and just painted in copper color. even though it is just aluminum, the cooler does a fine job at keeping the card cool   i think if full copper cooler price will expensive lar . at this price u get what u pay lar 

Eeek? You're saying IceQ4 maybe like this also? Wha da hec? I nvr heard of such news before! Someone tell me it's not true

like thermaltake duoorb also can't lower much tempearature if aply on 4870. artic cooling accelero much more beter in performance even it is not all copper materials.

It looks like fitting a bra on a GC

hahaha.. TT duo orb is useless lor...

copper not good in radiating heat i think. Unless u got uber fan to keep the copper temperature down, if not pointless for full copper. Copper ramsink should be fine.

2900XT has long e-penis ..... check hwbot then you will realize how long it is

ok back to topic now.

i think tats the design problem of duoOrb, but not copper's problem.
copper is good in radiating heat, if not, zalman would not introduce so much copper based coolers.

from what i've read
heat dissipation doesnt depend on the material
heat transfer from the chip to the heatsink is different though,copper definitely wins there
but aluminium is definitely lighter,cheaper and easier to make