Just to update -

Got the new 16GB RAM, installed it. Playing with capped frame rate at 60 and settings at medium. And I still got an auto reboot today about 3 hours into a DDO session and stream

This is beyond frustrating.

The extra RAM seems pretty helpful in terms of multitasking, etc. I pushed it last night with multiple applications to see what it could do, seems like it will make video editing for youtube much faster. But in terms of solving my DDO auto reboot issue...it did not unfortunately.

I'll look into uninstalling/reinstalling drivers, and also look into running a temperature/component monitoring program as was suggested next time I play and keep an eye on it. If that yields nothing guess I'll start looking at new graphics cards and hope that fixes it.