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Huh? Copper or Aluminum? - Page 2

post #11 of 42
Ever tried to make fins as thin as a CPU heatsink, out of pure copper?
Not gonna happen. lol. Too soft.
Very thin aluminum is still decently rigid. =D
    
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post #12 of 42
the benefits of the copper vs aluminum are dependent on multiple variables, i.e. fin density, spacing and air flow.

all things being equal, copper is better...but based on weight, production costs and heatpiper tower designs - aluminum coolers can perform quite admirably with adequate CFM fans (i.e. Tuniq &TR 120 extreme)
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post #13 of 42
Thermal Conductivity: higher = better | [k] = W/(m*K)
Copper 401
Aluminium 237
Silver 429
Air 0.025

Given the Exact same physical design... a copper heatsink will perform better...

Copper doesn't mean better... heavier doesn't mean better... go over to frostytech.com and look at their heatsink database if you need to know what's best...

Quote:
Originally Posted by dpawl31 View Post
Ever tried to make fins as thin as a CPU heatsink, out of pure copper?
Not gonna happen. lol. Too soft.
Very thin aluminum is still decently rigid. =D
Density of solid copper[/kg m-3]: 8920
Brinell hardness [/MN m-2]: 874

Density of solid aluminum[/kg m-3]: 2700]
Brinell hardness [/MN m-2]: 245


If you look at heatsinks very closely... you'll notice copper heatsinks have thinner fins than aluminum...

Pure copper is softer then steel... yes... but it is still stronger while being more mailable than aluminum...

most manufacturers use copper alloys due to the cost of copper... yet still perform better than their aluminum counterparts



Quote:
Originally Posted by Snerp View Post
I've been told that copper is better at conducting and aluminum is better at dissipating as well.
copper is better at conducting heat, radiating heat and conducting electricity when compared to aluminum...

Quote:
Originally Posted by hvacgaspiping View Post
Aluminum corrodes and gets crappy heat transfer.
Aluminum oxide is far less of an inhibitor than copper oxide...

Aluminum oxide isn't visible or at least is very similar to regular aluminum and melts at three times the temperature of aluminum...

Copper oxide however, will be red or black... and can be cleaned easily with a weak acid...

I use AC coil protectant on all my uncoated radiators to prevent this from affecting performance over time...
Edited by LiNERROR - 12/6/09 at 12:50pm
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post #14 of 42
Holy QUAD post Line! lol

I am right about pure copper though, right? Too soft to make thin fins?
I understand the alloy trick though.
    
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post #15 of 42
Quote:
Originally Posted by dpawl31 View Post
Holy QUAD post Line! lol

I am right about pure copper though, right? Too soft to make thin fins?
I understand the alloy trick though.
Isn't Zalman 9500/9700 made of pure copper? They're really thin too.


And yeah.. you have an edit button for a reason lineerror
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post #16 of 42
Quote:
Originally Posted by Max_GHz View Post
Thanks GGuys...I'm Going All Copper Then!!
Good luck finding that...

Don't worry about material...just get the best based on reviews. AKA Tuniq Tower 120
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post #17 of 42
Quote:
Originally Posted by kevsta112003 View Post
coppers specific heat is lower.

it gets hotter quicker, and cooler faster.
Exactly what I was going to say

Thanks chemistry 101
    
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post #18 of 42
Quote:
Originally Posted by dpawl31 View Post
Ever tried to make fins as thin as a CPU heatsink, out of pure copper?
Not gonna happen. lol. Too soft.
Very thin aluminum is still decently rigid. =D
Yes, HW Labs did it with their rads, 25 micron Copper Splitter Fin they are about the best cooling you'll get.
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post #19 of 42
Quote:
Originally Posted by Znth View Post
Yes, HW Labs did it with their rads, 25 micron Copper Splitter Fin they are about the best cooling you'll get.
Watch your fingertips
    
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post #20 of 42
Quote:
Originally Posted by JacKz5o View Post
And yeah.. you have an edit button for a reason lineerror

and i use my edit button often...

but those posts where in response to different posts...
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