Oddly enough, I seem to have a stable system with Linux 4.9. 4.10 and above are the ones that just crash randomly.
I really don't think it is the RAM here. If windows is running fine and memtest86 can't find anything wrong and older kernels are fine, I would look somewhere else.
What about the 4.12.x that ryzen support was added? Also there? Weird. My freezes were with 4.10, 4.11 and 4.12. From 4.12.1+ It has been fine and i have the same motherboard. The only issue i have is that the system sometimes locks up when suspended. But that might be a DE bug.
To be honest after the randomness in my experience with the non-supported RAM i would expect anything.
4.12.2 still crashes for me.
Edit: Just wanted to mention, about the RAM, the lower clocked version of this RAM was on the QVL for my MSI X370 SLI Plus and I had the same issues, so I'm willing to place money on the fact it isn't the ram.
That's a Level1Tip
Can you swap GPU's? Those damn Nvidia drivers led me to go without a GPU ( but I am on an Intel system )
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I had random freezing too. Just upgraded my BIOS with AGESA 1.0.0.6 and now no freezes anymore.
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Unlimited power is never stable. 
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That's good advice 376.xx seems to have problems for me on fedora 25 on Ryzen that is similar to what others have reported.
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i swore the first time i tried install ryzen i ended up with a 38x.xx driver. i was not crazy. will try one of these again (second one is a beta).
http://www.nvidia.com/download/driverResults.aspx/118524/en-us
http://www.nvidia.com/download/driverResults.aspx/120294/en-us
Same thing was happening on my RX 480 with the open source drivers, so I highly doubt it's NVIDIA related at all.
amdgpu ?
correct
So I've decided to order some of the ram that's specifically on the compatibility list for my motherboard: https://www.newegg.com/Product/Product.aspx?Item=N82E16820158127
That should eliminate at least one possible point of failure. I am honestly curious how this turns out.
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So I'm typing this from my new RAM on linux 4.12.2 and I'm just going to let Rust idle on one of the highly populated servers since that seemed to be a surefire way of crashing my old memory.
Don't you have a keyboard for that?
Nah man, I programmed the RGB switch on this ram to let me type in morse code.
Damn!
Looks sweet so far, and hasn't crashed, but only time can really tell on that.
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