Eight years ago I built a home backup/media/PVR server based around a Norco rackmount chassis and an ASUS E35M1-M Pro integrated motherboard/CPU, plus some SATA controllers. It's worked great (just 18W TDP, less than 100W for the entire 60+ TB server) backing up all the computers in the house, serving my bluray collection, recording up to 8 OTA channels at once, syncing to Google Music, Dropbox, etc., backing everything up to Backblaze, and other 24/7 processes. And it is still running today, but given the assumption that computer hardware always improves in performance-per-watt over time, and that the server is slower than I'd like when actively logged into it or having it "do something" that I have to wait for it to finish, I thought it was time to start looking around for the modern replacement for my moboCPU. And to my complete amazement, I discovered that entire niche had apparently disappeared from the market. Nobody seems to make ATX or MicroATX (i.e. boards with 3 or more PCI-E slots) mobos based on Intel Atom or AMD low-power APU's -- the low-power architectures seem to be exclusively for laptops, tablets, etc. So rather than build a new system around something like a 35W Celeron, I'm thinking the better thing is to figure out what the last, best low-power ATX/MicroATX motherboards were, so that I can keep an eye out for it on eBay. I'm looking for Intel Atom or AMD APU motherboards that have less than 18W TDP and more than 757 CPUMarks (https://www.cpubenchmark.net/cpu.php?cpu=amd+e-350+apu), with at least 3 PCI-E slots and preferably a good number of SATA ports.