Quote Originally Posted by Jonax View Post
In my case the systems are low end low power (and low electricity bill) processors. The last one a J 5005 Pentium system on a chip and before that J 1900 Celeron. Integrated graphics. Those systems are not producing sooo much waste heat, which simplifies the passive cooling. The Celeron system is a backbone from shuttle.eu with some heat-pipe / heatsink combination. That one still runs but is annoyingly slow nowadays.
Well you really don't need much for cooling this kind of computers. I mean we are talking here about 10 W TDP. I'm wondering if using heat-pipes in such applications is even viable. Heat-pipes do need to reach certain temperature before they are effective at transferring heat. You could probably get away by using solid copper pipe or simply transferring heat to a decent sized aluminium casing using thermal pads.

Any way since you are interested in such computer types I strongly recommend you check AMD Ryzen Embeded solutions https://www.amd.com/en/products/embe...nipc-solutions
With last two Ryzen generations AMD managed to greatly increase performance per watt. Not to mention that embedded graphics solution that AMD provides are more than capable of 4K video output. This gave AMD ability to beat Inter in mini PC market. But it is still behind ARM based solutions. And Apple M1 and M2 processors also stirred the market quite a bit.

Quote Originally Posted by Jonax View Post
All in all I think you could realistically get a fanless computer for home use if you one day decide to get a new one. That is if you can make do with low end computer. There are no doubt fanless high end computers too but I haven't explored that market much. A Pentium is sufficient for me. Most of the time.
Unfortunately my computing demands are quite larger than yours therefore making passive cooling much less viable solution.
So instead lately I'm thinking about making myself a custom PC case that would rely on using air ducts for routing cold air to where it is needed most. Unfortunately existing case solutions don't provide enough room for the needed duct system. Therefore I'm actually considering of making a custom PC case from wood. Why from wood you ask? Wood is much easier to work with than metals and it is also good for sound dampening.