HATs and other add-ons • Re: Canakit Pi 5 w/ SSD Kit and heat

Do you think the active cooler is enough to prevent throttling? Here are my current statuses:

Code:

vcgencmd measure_temptemp=60.9'C

Code:

vcgencmd get_throttledthrottled=0xe0000

As you can see throttled <> 0x0, which is what I should be aiming for.

It depends what you're planning on doing with the Pi5. I have the active cooler and official M.2 HAT+ with official NVMe drive, and it's all mounted in the official case (with the lid off). For me, in a roughly 20C ambient, it idles around high 40s to 50C. Under things like "7z b" and stress-ng, it gets above 60C in about 30-60s, then very slowly starts climbing through the low 60s. As I understand it, the temperature limit is 80C, so plenty of thermal headroom for heavy loads lasting 5 minutes or less, I reckon. I've not yet left it with a heavy load for an extended period to see how high it gets, but it seems like it could run for quite a while without hitting the limit.

Connecting into it with RealVNC from a PC, with a 1920x1080 virtual desktop, it still idles around 50C. I don't know what you're doing to generate load, so can't replicate that. Just opening Chromium and dragging the window around the desktop randomly generates a moderate load, but it doesn't get higher than 55C in a quick test. I'm running a fully up to date Raspios Bookworm 64-bit full desktop install, with the new Labwc desktop, everything mostly on defaults. I do have PCIe 3.0 enabled, which will likely increase the thermal load a little.

As for your throttled hex code, e is 1110 in the 5th nibble (bits 16-19), so it's saying it has throttled at some point in the past. The first nibble is zero (0000 for bits 0-3), so it's not currently throttled. See "man vcgencmd" for details:If you wanted to do so, the PCIe cable looks like it's long enough that you could probably swap out the 16mm GPIO riser and standoffs for 20mm, if you really wanted to give the active cooler a bit more breathing space. I doubt that it's really necessary in general, and only likely to be useful to do that if you are dealing with high ambient temperature and a very long running sustained extreme load on the chip.

Statistics: Posted by Murph9000 — Mon Jan 20, 2025 8:52 pm

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