Dimensions of the chip?


14 posts
by Toz » Sat Jan 05, 2013 2:55 am
Hi, I've just placed an order for a Pi, so I'm not expecting it to arrive for a few weeks but I've already worked out the first thing I'm going to do which is to install a small chipset heatsink or MOSFET coolers onto the CPU and install a 5v fan into the plastic case.

But I am wanting to know what size the chip is, so that I can purchase the correct size heatsink. Currently looking at a 27mmx27mmx8mm heatsink with thermal tape, would this fit?
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by malakai » Sat Jan 05, 2013 4:52 am
Typically what people sale are in this range.

size 2pcs 14 * 12 * 5.5 mm Pure copper
size 1pcs 11*11*5MM aluminum


Just so you know what your doing is purely aesthetic. And your better off spending the money on anything else IMHO. The Pi doesn't suffer from heat issues never seen one reported. The Media Center builds do tend to run a bit hotter I think mostly due to extreme overclocking but they still operate well within the range the chips need. It's yours to do with as you please I just don't want anyone to think this is a must have or has to be done. In either case it's a fun project.
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by Toz » Sat Jan 05, 2013 5:09 am
malakai wrote:Typically what people sale are in this range.

size 2pcs 14 * 12 * 5.5 mm Pure copper
size 1pcs 11*11*5MM aluminum


Just so you know what your doing is purely aesthetic. And your better off spending the money on anything else IMHO. The Pi doesn't suffer from heat issues never seen one reported. The Media Center builds do tend to run a bit hotter I think mostly due to extreme overclocking but they still operate well within the range the chips need. It's yours to do with as you please I just don't want anyone to think this is a must have or has to be done. In either case it's a fun project.


Thanks for the specs. Could possibly cut the heatsink with a grinder/dremel. And I know it probably won't do anything, I just think it'd look cool and be fun to do.
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by malakai » Sat Jan 05, 2013 5:13 am
Some people post pics with large heatsinks try that first so long as it fits in the case no harm no foul.
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by Lonewolff » Sat Jan 05, 2013 6:24 am
Out of interest, is there any way to get the current temperature of the CPU?

It would be fun to see who has the coolest runnig Pi 8-)
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by Joe Schmoe » Sat Jan 05, 2013 6:46 am
Lonewolff wrote:Out of interest, is there any way to get the current temperature of the CPU?

It would be fun to see who has the coolest runnig Pi 8-)


Or the hottest...

Code: Select all
pi@raspberrypi ~ $ vcgencmd measure_temp
temp=46.5'C
pi@raspberrypi ~ $


FWIW, I think that's normal. The highest I've seen it go to is 47.6, while running a video with omxplayer. I suppose the next thing to try is 'overclocking'.
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by Lonewolff » Sat Jan 05, 2013 10:55 am
Cool, thanks for the snippet. 8-)
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by Toz » Sat Jan 05, 2013 12:40 pm
Joe Schmoe wrote:I suppose the next thing to try is 'overclocking'.


That's the plan. :D
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by jamesh » Sat Jan 05, 2013 2:51 pm
It's about this big

Image

If you can find a heatsink that small - go for it.
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by Toz » Sat Jan 05, 2013 4:04 pm
jamesh wrote:It's about this big

Image

If you can find a heatsink that small - go for it.


I have.

The MOSFET heatsinks are the Enzotech Copper MOS-C1. They come with thermal tape pre-applied, and measure at 6.5(L) mm x6.5mm(W) x12mm(H). So 4x of them on each of the 3 main chips.
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by aTao » Sat Jan 05, 2013 4:07 pm
Toz wrote:
jamesh wrote:It's about this big

Image

If you can find a heatsink that small - go for it.


I have.

The MOSFET heatsinks are the Enzotech Copper MOS-C1. They come with thermal tape pre-applied, and measure at 6.5(L) mm x6.5mm(W) x12mm(H). So 4x of them on each of the 3 main chips.


3 main chips?, My working RPi is missing a chip!
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by jamesh » Sun Jan 06, 2013 1:19 am
He probably has the multiprocessor version.

(starts false rumour, runs and hides)
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by Unhban » Sun Jan 06, 2013 5:09 pm
No, there are three.... the main chip, the one by the USB sockets, and the voltage reg-looking-like-chip next to the electrolytic capacitor. I've seen a pic with heatsinks on all three *somewhere* on the internet :shock:

EDIT! Heatsink kit here! :
https://www.modmypi.com/shop/raspberry-pi-heat-sink-kit

Photo (but not of the ones sold above...):
http://i1072.photobucket.com/albums/w36 ... CN0915.jpg

More EDIT! Or water cool it here!SoggyPi:
http://redharbinger.com/forums/threads/soggy-pi.1102/
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by Lonewolff » Sun Jan 06, 2013 8:55 pm
Geez, if you want to play like that, then there are actually five - RG1, RG2, RG3, IC2, IC3.

Good luck finding a heatsink that measures 2 x 4 millimetres though :lol:
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