Thanks for the info. Yeah, I've been eyeing the RTX cards. I might pull the trigger at some point this year.
Sorry for the slow responses, I haven't check this site in a bit. Sounds good. I don't have experience with what I think you're attempting to do. I have read about some solutions to have different os/virtualizations and running the gpus. I think VMWare has something you can get to the 'bare' metal. I haven't hear of unRAID OS but I'll read about it. Definitely let me know when you get your build done! Sounds awesome!
I would buy different RAM. I've been having trouble getting the full speed with my motherboard/cpu combo. I've been talking with MSI about it. So annoying.
I also had issues with the Western Digital NVMe drive in Linux. I ended up exchanging it with another Samsung EVO 960 because that worked right away in Linux. I just recently upgraded to Ubuntu 18.04. Everything went pretty smooth with that. Getting CUDA setup correctly was a little tricky in Ubuntu but once you get the right Nvidia drivers running, it worked for me. I'm just using Tensorflow (GPU) and can't tell you about any other library (I have thought about checking out PyTorch though. It's been gaining a lot of popularity).
I haven't really ran into anything else too troubling. I've been running Ubuntu more than Windows. I did setup Tensorflow (GPU) on Windows and didn't have any issues with that but mainly develop in Ubuntu. I game on Windows and that's running pretty smoothly now too. I was seeing a little micro-stuttering in CSGO but I locked Steam/CSGO to a set of CPUs and that seemed to fix it. I think the micro-stuttering was happening when the game threads bounce between the AMD cores (not 100% sure).
Overall, I'm happy and it's been very stable for me (prime95 tested)
Good luck and be sure to post your build! Link me when you do it!
4.9 GHz is crazy! Even 4.7 GHz is crazy. I'm jealous. To answer your question, when I ran prime95, I ran it for about an hour and the peak temperature on the cpu got to 74 C. I'm not a prime95 guru, but different tests caused different temps. It would be stable at 66 C, then a different test it would go to 74 C, then another test would drop it to 64 C. A little uncomfortable for me, but I think it never got too dangerous for the cpu. CPU is at 1.35V. Also, I could see the GPU fan go from 0 to 240 rpms, but I wasn't even using it, so you could tell inside the case the temperature was getting warmer. You definitely can feel the heat coming off the radiator/fans. The H100i fans bumped up to 2400 rpm and the pump was running to 2800-2900 rpms.
Overall, so far so good. Passed the prime95 test for an hour. I know a true test for stability is way more than that (24 hours+), but I haven't had the heart to let it go for that long.