Q:
Whats with this?
This happens a lot, why is this happening an can i fix it?
Whats your system specifications and do you monitor temperatures while gaming?
Looks to me like the vRAM is overheating/unstably Overclocked.
i5 4690k @4.1ghz, r7 260x 1180/1680,8Gb G.skill Ripjaw 2133, 120gb ssd Gw2+OS
Your graphic card is having a Artificing Issue. Bring it to the shop where you got it from. Its broken