Raspberry Pi 4B with default case

[AstroOrbis]

Running ubuntu server and a few background tasks with the default case, connected to ethernet and plugged into power 24/7

[mattwelke]

I have a similar setup. Ubuntu server, stock case, stock clock. Funny, my graph ended up very similar to yours. A few degrees lower, maybe lower ambient temperature. Or maybe due to the 3 small aluminum heat sinks I used on it.

[AstroOrbis]

Nice graph! Where'd you get the heatsinks? I've changed my setup since then, now I have a small stack running with a fan pointed directly at it (part of a kit I bought from Micro Center), and I'd love to upgrade it with those.

[mattwelke]

I used to get my Pis from Canakit. Their kits always included a few aluminum heatsinks, one for the CPU, one for RAM, and one for USB. Example: https://www.amazon.ca/CanaKit-Raspberry-Pi-Extreme-Kit/dp/B09Q4TQBSZ

I haven't done testing comparing temps with and without the heatsinks. I'm just getting into this temps and overclocking stuff now. Today, I switched from a Canakit case with those 3 small heatsinks and no fan (because my fan died) to a Flirc case (https://www.amazon.ca/gp/product/B07WG4DW52), keeping two of the three small heatsinks attached, because the main heatsink link (Flirc is a metallic passive heatsink case) replaces the small CPU heat sink from before.

And I can say for sure that it helped a lot! It brought my temps down from 73 C idle to about 48 C idle. I was able to overclock to 2 GHz for turboing and still keep it under 70 C when it's pinned at 2 GHz under load.