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Raspberry Pi4 announced
Raspberry Pi4 announced
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Old 10th July 2019, 01:26 PM   #31
synonymous is offline synonymous  United States
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From what I understand,

The Pi4 heat issues are only if it is being taxed
Other than that, it can perform the same, heat wise, as the Pi3

The eliminated bottlenecks alone are a selling point to myself.
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Old 10th July 2019, 01:42 PM   #32
soundcheck is offline soundcheck  Germany
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The heat issue has already been addressed by a firmware patch.

Have a look.
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Old 10th July 2019, 02:21 PM   #33
CharlieLaub is offline CharlieLaub  United States
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Quote:
Originally Posted by synonymous View Post
From what I understand,

The Pi4 heat issues are only if it is being taxed
Other than that, it can perform the same, heat wise, as the Pi3

The eliminated bottlenecks alone are a selling point to myself.
The tests I quoted were with the Pi IDLE in a case with no heatsink or fan - it reached 77C! That is with it doing NOTHING at all.

There are certainly many improvements to I/O and speed, but the platform is just not as "usable" in general because of the heat issue.
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Old 10th July 2019, 02:25 PM   #34
CharlieLaub is offline CharlieLaub  United States
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Originally Posted by soundcheck View Post
The heat issue has already been addressed by a firmware patch.

Have a look.
It only reduced temps by about 3C overall according to what I read.

The TomsHardware article is with the board in free air. If you use a heatsink, that is still a viable option, but again the HATs are then blocked...

And they conclude the article with:
Quote:
The new firmware alone isn’t enough to prevent a Raspberry Pi 4 from throttling under sustained load - only additional cooling ... can guarantee that.
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Old 10th July 2019, 02:56 PM   #35
randytsuch is offline randytsuch
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Raspberry Pi4 announced
Pimoroni makes a fan/heatsink and passive heatsink

review and measurements here:
Raspberry Pi 4 Cooling Review: Pimoroni Heatsink and Fan Shim Tested - Tom's Hardware

On ebay, I found this heatsink, which is larger so should be better than the pimoroni passive one
New CNC Aluminum Radiator Protective Case Enclosure Heat sink for Raspberry Pi 4 | eBay

I wonder how loud the fan is on the active heatsink, that could be the deal breaker here.
I'm sure companies will come out with more heatsinking options, looks like you will need something with a pi4.

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Old 10th July 2019, 03:10 PM   #36
soundcheck is offline soundcheck  Germany
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Originally Posted by CharlieLaub View Post
It only reduced temps by about 3C overall according to what I read.

And they conclude the article with...

There are also other conclusions.

Such as:

Quote:
...the firmware update makes a dramatic difference...
3° can make a hell of a difference.

If this device now works properly under ""normal"" load conditions, I probably could live with that.
How it'll look with a HAT attached - we'll see.

IMO similar situations we've seen on earlier RPIs.

Last edited by soundcheck; 10th July 2019 at 03:13 PM.
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Old 10th July 2019, 04:28 PM   #37
soundcheck is offline soundcheck  Germany
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The RPI foundation seem to have confirmed the PI4 USB issue and ""expects"" to get the issue fixed in the future.

Intelligent chargers/PS will currently identify (based on the wrong impedance) the PI as audio device and that won't work.
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Old 10th July 2019, 05:39 PM   #38
relder is offline relder  United States
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The 3+ had plenty of thermal issues as well, mine would throttle itself back or simply lock up until I got a fan. I designed my hat to hang off on the side rather than over the pi.
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Old 10th July 2019, 10:02 PM   #39
Greg Erskine is offline Greg Erskine  Australia
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Raspberry Pi4 announced
My RPi4B's have been running piCorePlayer for over a week. They are "open" and temperature is not an issue, being a constant mid to high 50's. The player has a DAC hat. LMS has a USB drive. This is 20 degrees higher than previous RPi's.

Using my basic configuration, CPU usage is negatable, squeezelite maxes out at 0.4% and LMS maxes out at 0.5%.

I wouldn't stick one in an enclosure without adequate ventilation!
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Old 11th July 2019, 09:55 AM   #40
phofman is online now phofman  Czech Republic
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Ad hats - why not using some pin header extender ( e.g. Stacking Header for Pi A+/B+/Pi 2/Pi 3 - 2x20 Extra Tall Header ID: 1979 - $2.95 : Adafruit Industries, Unique & fun DIY electronics and kits ) + rotating the RPI by 90deg, so that the warm air from the heatsink fins can rise?

Last edited by phofman; 11th July 2019 at 10:10 AM.
 

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