Consider undervolting cpu and gpu and you will be able to get away with a leaner psu. I always do this and there really is no downside if you overclock the gpu a little to compensate for the undervolting. Your system will run cooler as well often stopping cpu/gpu from throttling down, so with a bit of luck you can even gain performance while saving on power. It depends on the cpu/gpu combo, but you can expect to save around 50 Watts under full load with both components properly undervoltet.

Here’s a very good guide for undervolting your gpu under windows, it’s meant for nvidia gpus but the process is very similar with amd gpu’s and/or under linux.

https://github.com/LunarPSD/NvidiaOverclocking/blob/main/Nvidia Overclocking.md

Thanks, I did not realise that. So this app is for Mac to Mac communication only. If seems for briar you need to run a server still or messages will get lost between mobile users. How does this new app solve that problem? On mobile phones disconnects will happen regularly as network coverage changes and different network towers connect and disconnect when you are on the move. You might as well spin up your own xmpp server at that point, as that protocol is tried and tested for over 20 years and very lightweight and battery friendly as well…

https://archive.is/mTyVa

^^ paywall be gone!

There is already a really good foss app that does exactly that, it’s called briar and is as secure and private as it gets. The downside with p2p communication apps being, that they eat your phones battery for breakfast. Still a good option for activists or journalists I think. It’s a good way to get around the “server in the middle” problem. Still more convenient to run your own (xmpp) server at home imho…