Reoccuring BSODs (0x3b, 0x50, 0xa) across any OS I use

Backstory: For months on Windows 7 I was getting lots of BSODs, most of them being the ones in the title. I switched to Win10 and most of the blue screens went away but I was having artifact problems in my games. I thought it was my video card at fault but whenever I reverted back to Win7 every game ran perfectly and I don't have artifacts in Win7. That is what made me think it was a driver issue, and it confirmed it a bit more in my head when I completely reinstalled Win7 and all of my problems went away for a day or two and then 1 BSOD, and then another one the next day, and then two the next, and so on and now I am having them around 2-4 times a day depending on what I am doing.

So now I'm thinking it is probably a hardware problem but I still am not sure and have hopes that it's just a faulty driver. I was having similar issues with the original RAM I had in the computer and got new RAM and the problem persisted. Maybe it's a problem with my mobo? I ran prime95 for about 2 hours and there were zero problems and temps were between 65-70c. I can run Unigine, with no heat problems, for as long as I have tried so far which was about 30 minutes. One of the only tests I haven't done yet is memtest86+. I will probably be doing that before I go to sleep tonight, but in the meantime I wanted someone to look at my latest BSODs and see if there is something specific that I am not seeing because I'm not a professional and get limited knowledge from the dumps.

Specs are: i7 4790k
msi r9 390
z97mx-gaming 5 mobo
16g ballistix ram DDR3 @ 666MHz
750cx psu
240g sandisk ssd