Cooling Ram + CPU


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by sharix » Mon Jun 18, 2012 12:55 pm
no, it would be inconvenient.
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by Lob0426 » Tue Jun 19, 2012 12:04 am
AndrewS wrote:Do people fit heatsinks to their mobile phones too? ;)


No but the iPad3 sounds like they could use them. Complaints about them getting real warm. Besides the area between the fins will hold more sequines.
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by Bjarkeah » Tue Jun 19, 2012 3:28 pm
Here's mine:

Image

Running at 1,35 volts it actually does get a little hot. Will probably be using a fan when putting more juice into it. Still haven't got it running at 1200 mhz! :(
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by zeeteex » Wed Jun 20, 2012 11:05 am
Raspi
arm_freq=1150
sdram_freq=600
gpu_freq=500
over_voltage=8
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by RaTTuS » Wed Jun 20, 2012 11:24 am
using
http://www.amazon.co.uk/gp/product/B004 ... 02_s00_i00
mine runs at 42deg C [it's held onto the main chip with an elastic band ]
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by payne747 » Wed Jun 20, 2012 2:16 pm
I imagine with future peripherals via the GPIO pins and extended features, the temps may start to creep up, but right now I've decided against modding the chip with cooling. After extended use, the SoC can get too hot to touch but it doesn't seem to affect productivity (like a typical Intel quad core would!).

It's going to take some getting used to running a device without any cooling, the gamer in me just wants to start designing the worlds smallest water cooling unit ;)
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by pygmy_giant » Sun Jun 24, 2012 11:51 pm
Surely the Pi is too new for anyone to quantify the effect of a heatsink on product life. I would guess that a heatsink would extend life, but from what to what? Doubt we'll ever know.
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by abishur » Mon Jun 25, 2012 1:58 am
pygmy_giant wrote:Surely the Pi is too new for anyone to quantify the effect of a heatsink on product life. I would guess that a heatsink would extend life, but from what to what? Doubt we'll ever know.


For me, it was less about improving product lifespan as it was product stability. While I can testify that the Pi is more stable, I regrettably cannot attest to whether this is a factor of the heatsinks, or an over all improvement to the pi itself!
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by Lob0426 » Mon Jun 25, 2012 4:41 am
I know some of you have already seen this.
In the thermal image you can see quite a bit of thermal dissipation through the PCB at the LAN9512 chip (mid/high right). There is some more around the SoC (middle chip). Cooling really would do some good on the LAN9512. Cooling the RAM module on top of the SoC would probably reduce the dissipation to the PCB to near nil. Does not appear to be too bad at the regulator (lower left). But of course this will depend on how close to spec your PSU is. A higher volt PSU could really push the regulator heat up. Higher temperatures at the traces generally mean higher resistance. In the article they erroneously identify the LAN9512 as the SoC.

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by XsCode » Mon Jun 25, 2012 3:52 pm
AndrewS wrote:Do people fit heatsinks to their mobile phones too? ;)


You've obviously never owned a HTC One-X :shock:
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by Chris Goodwin » Mon Jun 25, 2012 5:50 pm
I'm guessing the bodies of the ethernet and/or USB connectors are meant to partially act as heat sinks for the USB PHY. Problem with that being that I couldn't get my USB wireless adapter to connect when it was in the USB hub, but it did connect in the onboard USB. While the SOC and/or USB chips might be ok under heat, what about anything plugged into them?

I've been seeing some funky behavior in the wireless adapter that now I think of it could be heat related. I'm thinking I will try to heat sink the USB chip, at least.
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by Lob0426 » Mon Jun 25, 2012 10:27 pm
I have been having trouble with the wireless in the powered hub. I am suspecting RF interference. A lot of cabling around a RasPi. Mine just at random locks to a black screen. Unhook the wireless USB and it all runs great again. I have two wireless sticks a WG111v2 netgear and a WUSB54GC v1 Linksys. The problem happens with both of them.
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by jewesque » Tue Jun 26, 2012 7:02 pm
Knowing full well that it's some serious overkill, I will still be planning out a cooling solution for my RPi. I'll be holding off on it as yet, though, because I plan to use Arctic Silver Alumina thermal epoxy, which the AS site advises "Arctic Alumina Thermal Adhesive is a permanent adhesive. Any components you attach together with Arctic Alumina Thermal Adhesive will stay attached forever."

Needless to say, I don't want to find out that my heatsink is now too tall for the add-on cards I plan for in the future, and since it's not something that needs to be tackled now, I see no reason to rush it. :)

Depending on the locations and situations the RPis will end up in, I may even put a fan into the case just to help keep air moving. My computer geek nature just isn't comfortable with completely passive cooling, try as I might to listen to the logic.
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by Lob0426 » Wed Jun 27, 2012 3:09 am
Muhahaha!!! :twisted: I am dragging them to the "Dark Side".

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by AndrewS » Wed Jun 27, 2012 10:37 am
Let go of your heatsink. Trust the Foundation, Luke :lol:
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by Lob0426 » Wed Jun 27, 2012 6:27 pm
AndrewS wrote:Let go of your heatsink. Trust the Foundation, Luke :lol:

Too late I dropped a heatsink and it landed on the RasPi. It refuses to leave. :lol:
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by AndrewS » Thu Jun 28, 2012 1:45 am
The thermal adhesive is strong with this one :lol:
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by Lob0426 » Sat Jun 30, 2012 4:35 pm
AndrewS wrote:The thermal adhesive is strong with this one :lol:

Actually, no, the heatsinks keep sliding all over the place! :lol:
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by AndrewS » Wed Jul 04, 2012 1:51 pm
Lob0426 wrote:Actually, no, the heatsinks keep sliding all over the place! :lol:

Y'see! The Raspi is doing its best to get rid of the heatsinks it doesn't need ;)
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by abishur » Wed Jul 04, 2012 2:10 pm
AndrewS wrote:
Lob0426 wrote:Actually, no, the heatsinks keep sliding all over the place! :lol:

Y'see! The Raspi is doing its best to get rid of the heatsinks it doesn't need ;)


That's why I used thermal tape ;-)

Not as good as heatsink compound, but the stuff doesn't go slip sliding on me either :-P
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by Lob0426 » Thu Jul 05, 2012 3:12 am
lol : All I had was the compound at hand. Put too much on for one thing. They are firming up a bit now. I am going to buy some heat sinks that have the tape already on them. You can feel the heat clearly at the end of the fins. Working pretty well.
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by abishur » Thu Jul 05, 2012 4:34 am
Maybe we can swap tape for compound? I actually need to affix a heatsink to a voltage regulator, but I seem to have run out of my compound and I don't trust tape for this kind of application!
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by RaTTuS » Thu Jul 05, 2012 10:07 am
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by guidol » Thu Jul 05, 2012 12:55 pm
i will give the following cooler a try:
Cooltek VGA RAM Cooler Copper (available on Amazon.de)
Image

I think copper would cool down the raspberry better than aluminium
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by tufty » Thu Jul 05, 2012 2:40 pm
guidol wrote:I think copper would cool down the raspberry better than aluminium

Cu is a better heatsink material than Al, but it's probably gonna be surface area that limits performance for a sink of this size rather than materials.

That said, anything is better than nothing.
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