Akasa AK821 Copper Base Heatsink Review
Have you ever seen one of those television shows that explain
how typical household consumer products like carpets, pasta and pop tins are
made? Well, if you haven't make sure you watch out for the one that explains how aluminum pop tins are constructed because the Akasa Ak821 reminds
me a lot of that process.
got my facts straight, an aluminum cans shape is first made by dropping a
small disc of pure aluminum into a hollow steel die. A piston is forced into
this die under high pressure which squishes the aluminum into forming
the rough outside dimensions of the can. When this happens the aluminum flows
like silly putty (a technical term :-) to fill in the voids between the die and
piston. Once this process is over a fresh (half-finished) aluminum can is popped
out and then sent on down the assembly line where it is polished and its shape
refined. Looking at the Akasa AK821 it's easy to see that the heatsink has been
cold forged in a similar manner.
Along with the few hundred aluminum pins is a
nice copper base insert. With the copper insert
the Akasa AK821 makes direct contact with a metal which
has a high thermal conductivity. There is no way to tell how thick the
copper insert is, but as the base is just 7mm thick, I think 3-4mm wouldn't
be too much of a stretch.
- Model Name: AK821
- Fan Specs: Sanyo Denki, 4600RPM, 33.6CFM, 12V, 0.17A.
- Fan Dim: 25x60x60mm
- Heatsink Dim: 80x60x74mm
Material: Aluminum, copper insert
- Mfg by: Akasa
Sold By: www.lapicon.co.uk
When we review heatsinks here we always unscrew
the fans for an unobstructed view of the top of the heatsink fins. The Akasa
AK821's fins are so soft that as we screwed the fan back into place
a couple of the fins started get twisted up.
This isn't going to hurt the performance of the heatsink by any
means, but if you are interested in trying out more than just the stock
heatsink it would be something to take note of.
The fan shroud keeps all the fins in place, and offers spacing for
the fan, but the screws attached directly to the fins themselves.
Since this heatsink is made in one piece, there are no
joints between the base of the pins and the base plate. Unlike some other designs
we have seen in the past which press aluminum pins into holes drilled in a
separate plate of aluminum or copper, there are no joints here to worry about
over time - the AK821 is a one-piece unit.