gord1020
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Cooling a Pi 3 B+ (Heatsinks, etc)

Tue Sep 04, 2018 3:26 pm

Hello,

Does anyone know of any good passive cooling solutions for a Pi 3 B+? I found some Pi heatsinks but can't find any specifically for the Pi3 B+.

Any ideas?

fruitoftheloom
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Re: Cooling a Pi 3 B+ (Heatsinks, etc)

Tue Sep 04, 2018 5:55 pm

gord1020 wrote:
Tue Sep 04, 2018 3:26 pm
Hello,

Does anyone know of any good passive cooling solutions for a Pi 3 B+? I found some Pi heatsinks but can't find any specifically for the Pi3 B+.

Any ideas?

May one ask why you need cooling the 3B+ has very good heat dissipation as well as built in thermal throttling if it gets to toasty ?
Retired disgracefully.....

gord1020
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Re: Cooling a Pi 3 B+ (Heatsinks, etc)

Tue Sep 04, 2018 6:41 pm

fruitoftheloom wrote:
Tue Sep 04, 2018 5:55 pm
gord1020 wrote:
Tue Sep 04, 2018 3:26 pm
Hello,

Does anyone know of any good passive cooling solutions for a Pi 3 B+? I found some Pi heatsinks but can't find any specifically for the Pi3 B+.

Any ideas?

May one ask why you need cooling the 3B+ has very good heat dissipation as well as built in thermal throttling if it gets to toasty ?

We just want to make sure it doesn't overheat ever. Especially if the unit is deployed in a warmer room like a kitchen or cafeteria

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DarkPlatinum
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Re: Cooling a Pi 3 B+ (Heatsinks, etc)

Tue Sep 04, 2018 7:42 pm

I think heatsinks made for any Raspberry Pi should be ok with the Raspberry Pi 3B +. All chipsets are of similar size.
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DougieLawson
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Re: Cooling a Pi 3 B+ (Heatsinks, etc)

Tue Sep 04, 2018 7:45 pm

DarkPlatinum wrote:
Tue Sep 04, 2018 7:42 pm
I think heatsinks made for any Raspberry Pi should be ok with the Raspberry Pi 3B +. All chipsets are of similar size.
The discussion is whether they're a complete waste of time and money or not.

Best heatsink is the Flirc case - which has a 3B+ specific variant.
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mooblie
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Re: Cooling a Pi 3 B+ (Heatsinks, etc)

Tue Sep 04, 2018 11:34 pm

Try this:
http://www.123pricecheck.com/Product-49 ... Heats.html

Note that for a large heatsink like this (that covers most of the chips on the board) the Pi 3B and 3B+ are NOT the same.

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Imperf3kt
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Re: Cooling a Pi 3 B+ (Heatsinks, etc)

Tue Sep 04, 2018 11:54 pm

DougieLawson wrote:
Tue Sep 04, 2018 7:45 pm
DarkPlatinum wrote:
Tue Sep 04, 2018 7:42 pm
I think heatsinks made for any Raspberry Pi should be ok with the Raspberry Pi 3B +. All chipsets are of similar size.
The discussion is whether they're a complete waste of time and money or not.
I vote not a waste. At least, depending on what you use the Pi for.
For example, I'll use my own sotuation.

I run a program on my Pi that is really not intended to run on such a low spec device.
As a result, the Pi gets hot, the Pi throttles and becomes next to unresponsive, making it near impossible to even turn the Pi off.
The addition of a heatsink, keeps the Pi cool enough to never throttle, and runs whatever I demand of it somewhat fine.

So the answer to your question is; it depends
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n67
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Re: Cooling a Pi 3 B+ (Heatsinks, etc)

Tue Sep 04, 2018 11:58 pm

There's really two questions here:

1) Does the Pi need cooling?

2) Do heatsinks work?

The old-school CW is that the answer to the first question is No, and that, thus, the 2nd question is moot.

However, consider the recently released POE Hat-with-fan. Consider how much discussion there has been on this forum about the fan part of it and how you need software/OS support for it, and so on. If the answer to #1 was indeed in the negative, I doubt people would be yapping about the fan as they have been.
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LTolledo
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Re: Cooling a Pi 3 B+ (Heatsinks, etc)

Wed Sep 05, 2018 4:06 am

Will not delve on whether those are needed or not, but will post what I have (and because its MY REQUIREMENT)

3 RPi3B+ setups, ambient is around 29 to 32C. Desktop panel temperature displayed on top right corner (temp_zone0)

  1. The first one is in a modded laminated plate case with fan, the SoC is fitted with a 20x20x6 mm heatsink.
    The LAN/USB chip has a 9x9x14mm heatsink.
    The memory has a 12x12x5mm heatsink.
    Temp varies from 41 to 47C
  2. the second one is in a FLIRC gen 2 case,
    the LAN/USB chip has a 9x9x14mm heatsink,
    the memory has a 12x12x0.8mm copper plate.
    Temp varies from 45 to 52C.
    The FLIRC case is warm to the touch after a few minutes
  3. the third one is in a modded Quattro VESA case, the SoC is fitted with a 12x12x1mm copper plate, on top of the copper plate is a 38x38x10mm heatsink.
    The LAN/USB chip has a 9x9x10mm heatsink.
    The memory chip has a 12x12x1mm copper plate.
    Temp varies from 44 to 51C.
    If I enable a 25x25x10 fan the temp varies between 39 to 45C

My requirement is to keep my RPis cool and will not wait for it to overheat and regret later.
Last edited by LTolledo on Fri Sep 07, 2018 2:27 pm, edited 1 time in total.
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bensimmo
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Re: Cooling a Pi 3 B+ (Heatsinks, etc)

Wed Sep 05, 2018 8:46 am

The Kintaro ones seem to be popular as they have a large surface area and will help reduce the heat buildup for the lan chip too (an advantage or not, I do not know but it should reduce the heat going into the board. Would it raise the idle or low usage CPU temp, I do not know either.)

You need the one with the small square cut out and are around seven or eight pounds direct or on amazon.
They seem to have no stock at the moment.

...
w.r.t 3B+
Is a heatsink needed, no, it'll work either way.
Would I use one, yes as it runs faster for longer with one.
...

n67
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Re: Cooling a Pi 3 B+ (Heatsinks, etc)

Wed Sep 05, 2018 1:05 pm

Would I use one, yes as it runs faster for longer with one.
I would argue then that the answer is "Yes. It needs one to run optimally."

There is a tendency around here to assume two things:

1) You (rhetorical "you") are running the latest version of everything (that would mean 3B+ board and latest Raspbian)

2) You want it to run "optimally" - i.e., with everything going at full speed.

Under these assumptions, it would seem that the answer to question #1 is "Yes".
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