A31/A31p heatsinks

[thinkpadcollection]

Ever seen one with copper fins with copper plate, not the ones with aluminum fins for A31/A31p?

I always upgrade heatsinks on most of the notebooks to all copper, recently was R61 using a T61 heatsink.

Cheers, thinkpadcollection

[ajkula66]

Ever seen one with copper fins with copper plate, not the ones with aluminum fins for A31/A31p?

I'm not certain that I understand where you're going with this.

The heatsink found in 1.8/1.9/2.0 systems is perfectly adequate for its purpose. The problem with these machines is that the GPU is effectively cooled passively, by a thermal sponge on the bottom of the motherboard, but that's simply bad engineering and not much can be done about it.

[thinkpadcollection]

I'm talking about A30 and A31/A31p heatsinks, not the thick copper plate, I'm asking about anyone ever seen heatsink with *copper fins*? Fins is the thin sheets stamped out and fitted togther to make series of fins.

The GPU is on same side with CPU and fan's intake sucks air under past the GPU. The thermal pads is poor, Can stand changing to better ones.

Cheers, thinkpadcollection

[ajkula66]

I'm talking about A30 and A31/A31p heatsinks,

These are actually quite different.

I'm asking about anyone ever seen heatsink with *copper fins*? Fins is the thin sheets stamped out and fitted togther to make series of fins.

I don't recall seeing such a fan on A3x series.

The GPU is on same side with CPU and fan's intake sucks air under past the GPU.

Correct, but they're not of the same height and that's where one of the problems arise.

The thermal pads is poor, Can stand changing to better ones.

People have played with copper heatsinks attached to the GPU and chipset from the bottom of the planar. No recollection on what improvements - if any - that approach has yielded since I've never tested it myself.

I guess I should've made my question clearer: what *exactly* are you trying to accomplish?

[600X]

I think he/she believes that copper fins improve cooling. Sadly, that is a common misconception. One is not "better" than the other, instead, they simply offer different benefits. Copper has a higher heat capacity, so if you want to run your computer without a fan, copper will be more likely to achieve that. It's also helpful if the heatsink itself is small, so copper fins add some heat capacity. Aluminium fins dissipate heat better but can't store as much, so the fan will always have to run. In return however, more heat is being transferred away from the component, keeping it cooler when under constant stress. Aluminium is also lighter, although this only makes a significant difference on bigger machines.

[thinkpadcollection]

There was a photo of built up dust on the ATi GPU to prove that cooling helps. Believe me, I knew even that much spacing between fan housing and GPU is great height still works as long as fan spins and clean often.

Don't believe me on aluminum heatsink plate in some designs even fins? I had overheating in samsung netbook due to using thermal pad on atom CPU plus aluminum plate made combination worse and killed CPU usually a year even TDP watt is only 6.5W. Same thing for mom's Asus netbook using aluminum plate heatsink with fan too. Exact replacement in copper fixed this problem with shim along with replacement motherboard.

Excellent examples in samsung netbook, both heatsinks are thick metal thickness but this did not help for aluminum type.

One is aluminum plate heatsink with fan. This heatsink also have screwed on fan to heatsink itself. Heat difference is huge around CPU area vs fan area metal.

http://www.ebay.ca/itm/Samsung-NP-N220- ... 58cba4788e

This copper heatsink motherboard, exact exchange even CPU is different. Only mod I did is replace thermal pad for copper shim sandwiched with heatsink compound on all layers. Heat is much less on CPU area when fan is running and difference between cpu and fan areas is more even.

Reason I do not like dell heatsink designs in their notebooks is there were no plate sandwiched between heat pipe and aluminum on one side as opposed to heatpipe buried in the middle of fins with aluminum is better but copper fins is even better especially using one side with deeper depth like the R60 copper heatsink vs T60.

Side note: I have a mod idea coming for T410 2 and 3 pipe type with copper slug atop MCH/iGPU/Memory controller is too great in temperature graduation due to too thin CPU copper base pad.

Cheers, thinkpadcollection