A quick google search shows that many people have issues with the Intel Integrated Graphics on this particular PC (including on Windows) and this seems to be the solution: https://forum.asrock.com/forum_posts.asp?TID=17021&title=solution-for-intel-graphics-freezing-system

The main solution is Windows based but someone does offer a Linux route to the same solution, although a linked file that sounds like setting it up may be easier is missing. Essentially it looks like the chipset needs tweaking to throttle the GPU slightly to prevent the flaw triggering.

Great to see another person moving to Linux and OpenSuSE. My only caution if this is your first time with Linux is that a point release like OpenSuSE Leap is probably a better place to start than Tumbleweed. I’m on Tumbleweed and it’s generally good but I have had a few things break over the last couple of years, often fixed at next update in fairness but it is frustrating even as an experienced user. I have also had to reinstall Tumbleweed on one occasion; it wasn’t a big deal as I’d set up a separate Home and System partition. Tumbleweed is great but it is a rolling release and even though it’s a well tested one rolling releases are always riskier in terms of things breaking.