5 ms·
So does the pi 3 if you stick it in a case, even with a heatsink. I was using a pi 3 with a heatsink in the official case to play a h265 movie (which will be s
by LeonM 7y ago
So does the pi 3 if you stick it in a case, even with a heatsink.
I was using a pi 3 with a heatsink in the official case to play a h265 movie (which will be software decoded on a pi3). After about 10 minutes I noticed it started dropping frames and it displayed the thermometer symbol in the top-right of the display.
When I removed the top lid from the case, the temperature dropped enough for the thermometer icon to disappear and playback to continue smoothly.
- teraflop 7y agoYeah, thermal insulation behaves in much the same way as electrical insulation. If you put a conductor in series with a resistor, the conductor doesn't conduct all that well.
- TylerE 7y agoSeems like the winning solution would be to do as Apple does and make the case the heatsink. Aluminum is a pretty good thermal conductor, and at the very least it'd get you lots of surface area.
- thaumasiotes 7y agoWouldn't that make it hard to touch?
- amiga-workbench 7y agoIt wouldn't be too bad, the heat would be spread out and the surface would be at a much lower temperature than whats actually measured on die.
- iamnotacrook 7y agoSo don't touch it then?
- medmunds 7y agoLike this one? https://smile.amazon.com/Vilros-Raspberry-Model-Aluminum-Cooling/dp/B07MH39YNM/ https://smile.amazon.com/Vilros-Raspberry-Model-Aluminum-Coo... (I'm just running Hassio, so can't really speak to its thermal effectiveness myself. But it's got enough weight to keep cables from pulling it off my shelf.)
- yboris 7y agoThis one looks better: https://flirc.tv/more/raspberry-pi-4-case https://flirc.tv/more/raspberry-pi-4-case And is cheaper :)
- dbg31415 7y agoOver the years I've used Raspberry Pis as little media players, but they kept burning out every 3-4 months; the card reader (their SSD) wouldn't work, or they'd just blink some other error message. I thought they were just cheaply made ($35 after all). Anyway, long story short, I got a fan and the last one has been working for over a year without issues.
- seanhandley 7y agoSD cards have a limited number of writes so if you have the OS constantly writing to it then eventually it sets itself read-only. You can mitigate this somewhat with https://github.com/azlux/log2ram https://github.com/azlux/log2ram With some finagling you can get them to boot an OS from an external disk then your SD card can just hold a read-only boot loader.
- robocat 7y agoHeat causes flash memory to fail faster. I couldn't find a good source that quantifies the effect, but this mentions it: https://www.atpinc.com/blog/ssd-data-retention-temperature-thermal-throttling https://www.atpinc.com/blog/ssd-data-retention-temperature-t...
- dbg31415 7y agoWhat I saw is that half the time the card was still good, if I put it into another RPi, and half the time the card and the reader were both shot.
- pulse7 7y agoPLUS: You can get MicroSD card file system corruption if not using industrial grade MicroSD cards - especially when losing the power...
- velox_io 7y agoI believe this is mainly down to the FAT16/ FAT32 filesystem on the SD cards. Those filesystems have never been particularly reliable, when those were the dominant hard drive formats, MANY users back then lost data (and backing up to floppy had its own set of issues). This is why you have to unmount USB drives, if you pull the drive while data is still in cache would also create problems. The difference is when copying files to the drives, it's sequential, you may lose a file or two. When it's the OS using it as the main drive there are loads of write operations going on. At least it's easier to add battery backup to a Pi then most other computers.
- dleslie 7y agoFlirc makes excellent passive cooling cases for RPis. Basically the entire shell is a heat sink. Works for me, all my little media boxes run happily with them, despite running 24/7.
- mceachen 7y agoI just found out you can pre-order pi 4 cases: http://blog.flirc.tv/index.php/2019/06/24/new-pi-4-cases/ http://blog.flirc.tv/index.php/2019/06/24/new-pi-4-cases/ (I don't have any monetary interest in flirc, I'm just another happy pi3 flirc case owner)
- panda88888 7y agoSame here. I have 2 Flirc cases for the RPi 3b, and it keeps it happy. One is used for media the other for emulator.
- panda88888 7y agoIf anyone is interested in putting in a bulk order for Flirc Pi4 cases to save on shipping, let me know. I am in the San Diego area in SoCal.
- danaos 7y agoWell the pi3 does not support h265 acceleration natively, it should have been better to use it on h264 movies.
- londons_explore 7y agoHardware acceleration comes in degrees... It's totally possible to hand-code some GPU firmware to decode any bitstream far more efficiently than the CPU can do it... It's just a lot of work, and either Broadcom hasn't done it, or they don't want to license it to the Raspberry Pi.
- girvo 7y agoI thought (for some reason, I could be wrong), that hardware acceleration for h265 implies actual dedicated silicon, either in the SoC itself or on the board?
- LeonM 7y agoThat is correct. A pi 4 can doe h265 acceleration, but for anything other than a pi 4, use h264 content.
- nullbyte 7y agoI'm hosting a Node.js webserver from my RPi3, I have heatsinks and a case installed with no fan. Seems to run fine, it's never overheated or throttled for me.
- Florin_Andrei 7y agoI've a Pi3 with a CPU heatsink, in case. I have not seen it throttle after adding the radiator.