I'm not convinced the ones I've seen are power related, my system has been running videos in a loop for days, completed a few folding @home jobs, done some compiling, and I even added another (idle, low power) video card since the last hang. Storage doesn't jive with my observations either. I'm still leaning towards some isolcpus/nohz_full interaction, but I haven't yet started to add those options back. If you're running a v4.5 kernel, please be sure to rule out a transparent hugepage issue with transparent_hugepage=never on the kernel command line or run the latest stable v4.5.5 release (now fixed).
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