OK I have just built my first computer Worked first try DL windows 7 the CD that came with my MB and the CD that came with my 5770. Now i dont know how to test my comp to find out if i have errors or other problems it seems to work find except when i play World of Warcraft i get some freeze ups not very offen but it does happen, When it happens it last about 5 sec my screen will flash 1 time and im back going again.