three pages and no one has told him his graphics card is screwed
those are artifacts they are caused by overheating or faulty ram on the GPU , half of the screen freezing another gpu issue.
on very very rare occations this has turned out to a driver
issue first thing try other drivers
you could try clocking back (underclocking your gpu memory) you could try making sure your gpu is seated properly on yuor mobo , you could try reseating your gpu cooler paying particular attention to ram heatsinks (or the part of the HS that contacts the ram) you should monitor the gpu core voltage when under load (with an app such as msi afterburner) although core temp maybe fine your memory temp could still be too hot there is no way of monitoring it
If i were you id stop worrying about unrelated errors and concentrate on your graphics card its that thats failing