Having a few decommissioned Z90D7 I was thinking of using one as the basis of a low power & silent BTC Core Full Node.
Upgraded to 16GB Ram and got LXQt Fedora 30 installed on a 1TB SSD, Installed and configured TOR, then Installed Bitcoin Core Qt.ACPI-cpufreq is enabled. The CPU temperature is 42-44C at idle, and 56-58C at full load. The HDD's temp is 30-32C all the time.
Just for fun, imported a nice BTC Vanity Address!