I just wanted to report on my usage of X2 over last 8 years. I bought it at the very beginning of 2013. Since then it ran almost without an interruption and it was used as my home server, media center and emergency workstation at times.
Recently I upgraded it all the way from 14.04 to 20.04 without any big problems, alas still running with good ol' 3.8.13 kernel.
I'm running the governor in performance setting with passive heat sink - it rarely reaches above room temperature.
For those interested, the SD Card that I've been using is Samsung 16GB SDHC Memory Card Pro Series Class 10 UHS-I
https://www.bhphotovideo.com/c/product/ ... _sdhc.html
I would post a photo but it's too dusty for public showcase

Anyway, I just wanted to say thanks for a solid piece of hardware that did not malfunction in its over 70,000 hours of usage.
P.S.: When I used X2 as my temporary workstation during times when my laptop was broken down, I got used so much to the fanless operation that when I got my laptop back it felt weird to hear the buzz all the time.