i`m connected DVI to DVI, my driver are up to date, and beside this problem everything works fine

Hello , im a sketchup user for quite some while , aprox 7 years, i recently had an upgrade to my sistem a 27 inch monitor with 1440 p resolution, my graphic card is a MSi N560GTX-Ti Twin Frozr II/OC ,the problem i have is that when i open skp14 sometimes its working properly but usualy it freezes quite badly ( this is with fast feedback and harware acceleration on ) whitout fast feedback is working ok but the image quality is realy bad,i`m in a realy big mess ,if someone encountered this problem and resolved it please help.