Haven't been able to do much testing until recently.
So I took my GPU and RAM and put them in my brother's computer. I ran two twitch TV streams, played overwatch, and had WoW open. It didn't crash over multiple hours. I just got back home today and I put everything back in, and I opened WoW and had a youtube video on (a minute?) and my monitor went black for 2-3 seconds, it came back, had HDMI in the top left. I tab out, and the battle.net program was 'broken'. When I clicked it it pulls up and is just a blue outline rather than having all sorts of info on the screen. At this point I have no idea what to do. Power, drivers(I did clean installs that people on forums and CS told me to, including their tactics), something wrong with my entire motherboard? If I just play WoW with no video stream going on, it tends to be fine, probably 90% of the time.
EDIT: It also seems that his computer runs faster than mine, even though I have a stronger CPU, mobo, and an SSD.