http://www.google.fr/imgres?q=artefacts+carte+graphique&um=1&hl=fr&biw=1600&bih=780&tbm=isch&tbnid=xsP9LqwOZ4jxaM:&imgrefurl=http://www.pcastuces.com/pratique/materiel/overclocking_gpu/page6.htm&docid=hRJ6Od_HOuYbCM&imgurl=http://images.pcastuces.com/overclocking_gpu_28.png&w=502&h=348&ei=UbLzTsTZBMmZ8gPc6PmxAQ&zoom=1&iact=hc&vpx=1151&vpy=457&dur=199&hovh=136&hovw=182&tx=95&ty=71&sig=110159509337647910519&page=1&tbnh=136&tbnw=182&start=0&ndsp=28&ved=1t:429,r:19,s:0
*