3 ms·

But what about heat?

by bullen 6y ago

boris 6y ago
This review suggests that a passive heatsink should be sufficient to prevent throttling (probably with a caveat that it's not in an enclosure): https://downey.io/blog/raspberry-pi-4-heatsinks-and-fans/ https://downey.io/blog/raspberry-pi-4-heatsinks-and-fans/
- bullen 6y ago
  I know about the Raspberry 4: http://move.rupy.se/file/monstersink.jpg http://move.rupy.se/file/monstersink.jpg http://move.rupy.se/file/pi_4.jpg http://move.rupy.se/file/pi_4.jpg But this thing has less surface! I don't understand how it can be legal for the foundation to sell this without a heatsink!
  - NikolaeVarius 6y ago
    I dont understand by what law they could be forced to sell this with a heatsink.
  - tracker1 6y ago
    You mean like all the higher end CPUs that don't come with one either... gasp the insanity!
geerlingguy 6y ago
I didn't cover it in the review but did in a follow-up Q&A, in two places: https://youtu.be/vc_Lh_a1BQI?t=463 https://youtu.be/vc_Lh_a1BQI?t=463 https://youtu.be/vc_Lh_a1BQI?t=3303 https://youtu.be/vc_Lh_a1BQI?t=3303 Basically, in open air, unless you're in a hot desert, I couldn't get it to overheat/throttle. But in an enclosure you need at least a good heatsink with ventilation to allow convection, or failing that, a fan for active airflow. The CM4 IO Board has a 4-pin fan connector and a PWM chip on board so you can connect standard fans and incorporate them in your designs.
- technofiend 6y ago
  Jeff, It would be interesting to see if you can get the ESXi ARM fling running on the CM4: https://www.virtuallyghetto.com/2020/10/how-to-copy-the-raspberry-pi-uefi-files-and-boot-esxi-arm-using-just-usb-device.html https://www.virtuallyghetto.com/2020/10/how-to-copy-the-rasp... No idea if UEFI would open up more possibilities to boot from NVME? Also, does the CM4 PXE boot with the attached expansion board?
- bullen 6y ago
  It has to run at 60 degrees Celsius at full speed to maintain longevity, that might not be important for electronics that will have more performant replacements later, but with 1Gflops/watt 32-bit operation the raspberry 4 is peak humanity performance/watt/memory/longevity/simplicity/size/weight/$ (smaller lithography might actually reduce lifespan) so it needs to kept at a cool and silent TDP usage by design, specially since the form-factor has non standard heat-sink attachment. Fans are not a long term solution to anything and that is what makes the raspberry 4 really valuable; namely it's on the limit of what _can_ be cooled enough passively without adding too much weight/size! I'm all in on the standard raspberry 4 for server clusters and gaming clients for my 3D MMO that I'm writing from scratch! Sad that the mounting (plastic is not long-term, the SO-DIMM was better in that regard) and form-factor of these are a bit odd, we'll have to wait and see if someone makes boards/heat-sinks for it! They need to be compact even when stacked like these: http://move.rupy.se/file/pi_4.jpg http://move.rupy.se/file/pi_4.jpg The home computer revolution started with the C64 and peaked with the raspberry pi 4, everything in-between has just been revenue landfill.

But what about heat?

by bullen 6y ago

But what about heat?

This review suggests that a passive heatsink should be sufficient to prevent throttling (probably with a caveat that it's not in an enclosure): https://downey.io/blog/raspberry-pi-4-heatsinks-and-fans/ https://downey.io/blog/raspberry-pi-4-heatsinks-and-fans/

bullen 6y ago
I know about the Raspberry 4: http://move.rupy.se/file/monstersink.jpg http://move.rupy.se/file/monstersink.jpg http://move.rupy.se/file/pi_4.jpg http://move.rupy.se/file/pi_4.jpg But this thing has less surface! I don't understand how it can be legal for the foundation to sell this without a heatsink!
- NikolaeVarius 6y ago
  I dont understand by what law they could be forced to sell this with a heatsink.
- tracker1 6y ago
  You mean like all the higher end CPUs that don't come with one either... gasp the insanity!

geerlingguy 6y ago

I didn't cover it in the review but did in a follow-up Q&A, in two places: https://youtu.be/vc_Lh_a1BQI?t=463 https://youtu.be/vc_Lh_a1BQI?t=463 https://youtu.be/vc_Lh_a1BQI?t=3303 https://youtu.be/vc_Lh_a1BQI?t=3303 Basically, in open air, unless you're in a hot desert, I couldn't get it to overheat/throttle. But in an enclosure you need at least a good heatsink with ventilation to allow convection, or failing that, a fan for active airflow. The CM4 IO Board has a 4-pin fan connector and a PWM chip on board so you can connect standard fans and incorporate them in your designs.

technofiend 6y ago
Jeff, It would be interesting to see if you can get the ESXi ARM fling running on the CM4: https://www.virtuallyghetto.com/2020/10/how-to-copy-the-raspberry-pi-uefi-files-and-boot-esxi-arm-using-just-usb-device.html https://www.virtuallyghetto.com/2020/10/how-to-copy-the-rasp... No idea if UEFI would open up more possibilities to boot from NVME? Also, does the CM4 PXE boot with the attached expansion board?
bullen 6y ago
It has to run at 60 degrees Celsius at full speed to maintain longevity, that might not be important for electronics that will have more performant replacements later, but with 1Gflops/watt 32-bit operation the raspberry 4 is peak humanity performance/watt/memory/longevity/simplicity/size/weight/$ (smaller lithography might actually reduce lifespan) so it needs to kept at a cool and silent TDP usage by design, specially since the form-factor has non standard heat-sink attachment. Fans are not a long term solution to anything and that is what makes the raspberry 4 really valuable; namely it's on the limit of what _can_ be cooled enough passively without adding too much weight/size! I'm all in on the standard raspberry 4 for server clusters and gaming clients for my 3D MMO that I'm writing from scratch! Sad that the mounting (plastic is not long-term, the SO-DIMM was better in that regard) and form-factor of these are a bit odd, we'll have to wait and see if someone makes boards/heat-sinks for it! They need to be compact even when stacked like these: http://move.rupy.se/file/pi_4.jpg http://move.rupy.se/file/pi_4.jpg The home computer revolution started with the C64 and peaked with the raspberry pi 4, everything in-between has just been revenue landfill.