Can someone explain to me what causes my screen to show these artifacts?

nOm nom NOM3

Distinguished
Oct 11, 2013
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I have no idea what these are actually called it would be nice to know what they are as well

  • GTX 780 Ti slightly overclocked
    344.11 WHQL drivers
    AMD FX8120 4GHz
below are a few examples of what I am trying to deal with
this also happens in games occasionally, although it is mostly in my browser (Mozilla Nightly 35.0a1 )
iWi0bLW.png

wlLbyNJ.png

JlNVPJT.png