With same issue is also fighting kszaq with LE 8.2. Some boxes aren't able to install to internal. At first try to install LE 8.2 then you can simple upgrade to LE 9.0. The second issue is most like thermal. You can try LE 8.2 build with thermal sensor disables or improve box cooling.
Thank you very much for the reply.
I suspected that that it may be a thermal issue, and today I added extra heat spreaders and a fan on open box, will test tonight if it's still running in the morning.
I will also try LE 8.2 to internal and upgrade. I'll post the results here.
------Edit------
Install to internal, upgrade and restore worked great!
Again, thanks for the tips