I have a RPI4 running as home server. The install is 32-bit, and I wanted to update it to a 64-bit aarch64 system.
So I grabbed another RPI4 and sd card and started a new install. But I found a bit surprised that the base system with almost anything installed gets a lot hotter with this setup. My current 32-bit install stays about 50 C with light load, while this new aarch64 install stays at 59 C while idle.
Is this expected? Is there a way to improve the power usage of the aarch64 image or should I stay on armv7 release if I want to keep temperature lower?
Also which features will I miss when switching from armv7 to aarch64? The installation guide is not clear about this.