Constant BSODs, all mentioning atikmdag.sys

[megaSUPT]

I have been having very frequent BSODs, recently. I believe they have been happening since I got my pc however I was always too lazy to fix them and they were not very frequent. I have been playing on a minecraft modded server recently and they have suddenly become much more frequent.
screenshot from bluescreen view: http://prntscr.com/7gzd99
something which could be related is a glitch which i get in games and sometimes on chrome as seen here:
http://prntscr.com/5ebv6m
http://prntscr.com/7gzn9m

I have done 3 memtest passes and I used Driver booster to check that my drivers were up to date!
If you need any more info please ask,I will be happy to oblige.
My specs:
i5 4670
r9 280x
8gb ram (2x 4gb)
850 watt psu

I probably have many problems, and I would love to get them all fixed, if someone could do that I would be willing to buy them a steam game under 5 euro as a reward

 

[MarkW]

You got something going very wrong there. The crashes are all over the map... NT, ATI, Intel...

I suspect bad memory, overhearing CPU or flakey power supply. It also could be a poorly written patch.

Download HWinfo, and start logging temps on your system. When you have a crash go look at the logs and see if anything is hotter than it should be.

Next, run MemTest. Its free. Download the ISO image, and burn it to disc, then boot from that disc and run it at the very least 10 hours. If it finds any errors, it will tell you on the screen.

So into Safe mode (after BIOS logo passes, press and hold F8), and select Safe Mode with networking. Uninstall your video drivers, reboot, and install a new copy of them. Then reboot normally.

If none of those resolve the problem, come back and we'll try some more things.